JPH06348436A - Remote printing system - Google Patents

Abstract

PURPOSE:To allow a computer requesting printing operation to control the operation of a remote computer and a printer connected to the computer in the case of sharing the printer among plural computers connected to a network. CONSTITUTION:A remote printer control part 126 in a client 120 transmits a control command describing an instruction for controlling a print server 110 and a printer 130 to the server 110 and an operation control part 116 in the print server 110 controls the operation of at least one of a printing job receiving part 112, a queue managing part 113, a printing control part 115, and a printer 130 based on an instruction described in a control command transmitted from the client 120. The operation control part 116 can also be driven when a certification control part 117 certifies the validity of the control command.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a host (hereinafter, referred to as a print) to which a printer is connected when a plurality of computers (hereinafter referred to as hosts) connected to a network share the printer and perform printing. It is possible for a host (hereinafter, referred to as a client) other than the print server to control the operations of the server and the printer or a printer connected to the network (hereinafter, referred to as a network printer). Remote printing system.

[0002]

2. Description of the Related Art In recent years, a remote printing system has become widespread in which a plurality of hosts connected to a network share a printer for printing. An example of such a remote printing system is, for example, JP-A-4-31711.
No. 8 and JP-A-3-232014.

A general conventional example of a remote printing system in which a plurality of hosts connected to a local area network (hereinafter referred to as LAN) share a printer will be described below with reference to FIG.

In the example of FIG. 2, the client 220 uses the S
CSI interface 240 (ANSI X3.131-
1986, X3T9.2 / 86-109 etc.)
The printer 230 connected to the print server 210,
An example is shown in which printing is performed in common with another client connected to the LAN 200. In addition, in FIG.
Only one print server 210 and one client 220 connected to 00 are shown, and other clients and print servers are omitted.

In FIG. 2, the client 220 includes a network communication unit 221, a print job transmission unit 222, a queue 227, a queue management unit 223, and a printing process 22.
4. The external storage device 225 is configured to request the print server 210 to perform printing and to perform remote printing to the printer 230. On the other hand, the print server 210 includes a network communication unit 211, a print job receiving unit 212, a queue 214, a queue management unit 213, and a print control unit 215. The print server 210 accepts a print request from the client 220 and prints with the printer 230. To do.

The operation of printing the file 226 of text data, graphic data, etc. stored in the external storage device 225 with the printer 230 will be described below.

In the client 220, the user or application program issues a print command for instructing the printing of the file 226 to the printer 230, so that the print process 224 is activated.

When the print process 224 is activated, it reads the instructed file 226 from the external storage device 225 and prints to the instructed printer 230.
Generate a print job. Then, the printing process 224
Passes the generated print job to the queue management unit 223,
The process ends.

The queue management unit 223 stores the delivered print job in the queue 227. The queue 227 is a queue for print jobs, in which print jobs are arranged in the order in which they are printed, and there is a queue 227 corresponding to each printer that prints.

When the print job is stored in the queue 227, the print job transmission unit 222 reads the print job and transmits it to the print server 210 through the network communication unit 221. The network communication unit 221 performs protocol processing corresponding to the network and
It controls communication with other hosts connected to the 200. After that, the print job transmission unit 222
Through the network communication unit 221, the print server 2
When the reception confirmation response from 10 is received, the queue management unit 2
The queue management unit 223 deletes the print job whose reception is confirmed, and ends the transmission process.

On the other hand, in the print server 210,
The print job receiving unit 212 is the network communication unit 211.
When the print job transmitted from the client 220 is received through the above, the print job is passed to the queue management unit 213. The network communication unit 211 performs protocol processing corresponding to the network and controls communication with other hosts connected to the LAN 200.

The queue management unit 213 stores the delivered print job in the queue 214. The queue 214 is a queue of print jobs, and print jobs are arranged in the order of printing.

When the print job receiving unit 212 finishes receiving the print job, the print job receiving unit 212 transmits a print job reception confirmation response to the client 220 through the network communication unit 211, and finishes the process.

Subsequently, the print controller 215 causes the queue 21
The print job is taken out from the head of No. 4 and transmitted to the printer 230 through the SCSI interface 240.

In the printer 230, when the printer controller (PRC) 231 receives a print job from the print control unit 215 through the SCSI interface 240, it performs drawing processing and drawing processing results (hereinafter referred to as drawing data). To the printer engine 232 through the printer engine interface 612. The printer engine 232 controls the printer printing mechanism based on the passed drawing data to perform printing.

The print control unit 215 deletes the print job from the queue 214 at the end of printing.

The procedure for generating, transmitting, receiving, and printing a print job as described above is performed by the line printer daemon (l
pd), lpd protocol (Request for Comments 1
179), TCP (Transmission Control Protocol)
/ IP (Internet Protocol) or the like.

For example, in a system implemented using lpd, print process 224 is called lpr,
The queue management units 213 and 223 are called a spooler, and the print job transmission unit 222, the print job reception unit 212, and the print control unit 215 are called an lpd. The network communication units 211 and 221 are TCP / IP protocols.

[0019]

In the above-described conventional remote printing system, the command (lpd is used to locally control the operation of the print process 224 and the print job transmission unit 222 in the client 220 that requests printing. In the system realized by using
called lpc. However, there is no means for controlling the operations of the print job receiving unit 212 and the print control unit 215 of the print server 210 in a remote place.

If lpc is used, the client 2
20 can locally operate the order of the print jobs in the queue 227, but cannot operate the order of the print jobs in the queue 214 of the print server 210 at the remote location.

Further, the printer 220 is connected to the client 220.
When a printer other than 30 is connected using a SCSI interface or the like to print the file 226, the client 220 can control the other printer locally but at a remote location. A printer 2
It was not possible to control the operation of 30.

By the way, when it is possible for the client 220 to control the operation of the print server 210 or the printer 230 in a remote place, the arbitrary client 2
When the control from 20 is permitted, when another client 220 requests printing, there is a possibility that printing may not be performed and other inconvenience may occur. Therefore, it is necessary to limit the clients 220 and users who can control the operations of the print server 210 and the printer 230.

A first object of the present invention is that a client
It is possible to control the operation of the print server and the printer connected to the print server.

A second object of the present invention is to make it possible to restrict the clients and users who can control the operation of the print server and the printer connected to the print server.

A third object of the present invention is to make it possible to achieve the first object and the second object even in a remote printing system using a network printer.

[0026]

In order to achieve the first object, the present invention comprises a network, a plurality of clients connected to the network, and at least one print server connected to the network. , In a remote printing system in which a client sends a print job to a print server to share a printer connected to the print server for printing, a control in which a command for controlling the print server and the printer is written to the client is described. A remote printer control unit that sends commands to the print server is provided. Further, the print server includes a print job receiving unit that receives a print job, a queue management unit that manages a queue that is a queue of print jobs, and a print control unit that controls the operation of the printer. The print server receives the control command transmitted from the client, and based on the command described in the received control command, the print job receiving unit, the queue management unit, the print control unit,
An operation control unit for controlling the operation of at least one of the printers is provided.

As a result, the client can control the operation of the print server at the remote location and the printer connected to the print server.

To achieve the above second object, the present invention further stores in the print server a client and / or a user of the client who is permitted to control the operation of the print server and the printer. An authentication control unit having an authentication table is provided, and the authentication control unit authenticates the control command when the client that is the sender of the control command and / or the user of the client is stored in the authentication table. In this way, when the authentication control unit authenticates the control command, the operation control unit performs the operation based on the command described in the received control command.

This makes it possible to limit the clients and users who can control the operations of print servers and printers at remote locations.

In order to achieve the third object, the present invention comprises a network, a plurality of hosts connected to the network for communicating with each other, and at least one network printer connected to the network. In a remote printing system in which a printer sends a print job to a network printer to perform printing by sharing the network printer, the network printer has a configuration similar to that of the print server described above. In addition, in a remote printing system using such a network printer,
It was made possible to achieve the above object.

[0031]

In the client, the remote printer control unit, when activated by the user or the program of the client, initializes the printer, starts printing, interrupts printing, and controls the operations of the print server and the printer at a remote place. A control command describing commands for requesting restart of printing, stop of printing, change of print job order, etc. is transmitted to the print server.

In the print server, when the operation control unit receives the control command transmitted from the client, the operation control unit, based on the command described in the control command, the print job receiving unit, the queue management unit, the print control unit, Control the operation of at least one of the printers. For example, when the command described in the control command is a command requesting printer initialization, the operation of the print control unit and the printer is controlled. Further, for example, in the case of an instruction requesting a change in the order of print jobs, the operation of the queue management unit is controlled.

As described above, according to the present invention, the client can control the operation of the print server located at a remote place and the printer connected to the print server.

It should be noted that a plurality of printers can be connected to the print server, and the operation control section has a print job receiving section, a queue management section, a print control section, a printer according to the printer designated by the control command. Control the behavior of.

In the print server, the authentication control unit authenticates the control command when the client or the user of the client who is the sender of the control command is stored in the authentication table, and the operation control unit ,
It operates when the authentication control unit authenticates the control command.

As described above, according to the present invention, it is possible to limit the clients and users who can control the operation of the print server and the printer connected to the print server.

Further, by configuring the network printer to have the same configuration as the above-mentioned print server,
The network printer can be provided with the function of a print server, and in a remote printing system using such a network printer, the operation of the network printer can be controlled from the client like the above-mentioned print server. it can.

[0038]

Embodiments of the present invention will be described below with reference to the drawings.

First, a first embodiment of the present invention will be described with reference to FIGS. 1 and 3 to 5.

FIG. 1 is a block diagram of a remote printing system according to the first embodiment of the present invention.

In the example of FIG. 1, the client 120 uses the S
An example is shown in which the CSI interface 140 is used to share the printer 130 connected to the print server 110 with another client connected to the LAN 100 to perform printing. The print server 110 and the printer 1
In addition to the SCSI interface 140, the interface with the Centronics, RS23
2C, RS422, GP-IB (General Purpose Inte
rface Bus) can also be used.

Further, in FIG. 1, only one print server 110 and one client 120 connected to the LAN 100 are shown, and other clients and print servers are omitted. In addition, the print server 1
Although a plurality of printers can be connected to the printer 10, this drawing shows a configuration in which only one printer 130 is connected.

The client 120 is the print server 1
10 is a host for requesting printing to the printer 130 for remote printing, a print process 125 for generating a print job, an external storage device 150 for storing a file 151 such as text data and graphic data, and transmission end. A network that controls communication between a queue management unit 123 that stores / deletes print jobs in a queue 124 that is a queue for waiting print jobs, and that changes the order of print jobs in the queue 124, and another host. The communication unit 121,
A print job transmission unit 122 that transmits a print job to the print server 110, and a control command (hereinafter, referred to as a remote print control command) for controlling the operations of the print server 110 and the printer 130 at a remote place are issued. And a remote printer control unit 126.

On the other hand, the print server 110 accepts the print request from the client 120, and the printer 130
A network communication unit 111 that controls communication with other hosts and a client 1
20. A print job receiving unit 112 that receives a print job transmitted from the computer 20 and a queue 11 that is a queue for print jobs.
4, a queue management unit 113 that stores / deletes print jobs in the queue 114, and changes the order of the print jobs in the queue 114, a print control unit 115 that prints to the printer 130, and a client 120. Printer 1 according to the remote print control command issued from
30, a print job receiving unit 112, a queue management unit 113,
An operation control unit 116 that controls the operation of at least one of the print control units 115 and an authentication control unit 117 that determines the validity of a remote print control command issued from the client 120.

The operation of printing the file 151 stored in the external storage device 150 with the printer 130 will be described below.

In the client 120, a user or a program issues a print command for instructing printing of the file 151 to the printer 130.
The print process 125 is activated.

When the print process 125 is activated, it reads the instructed file 151 from the external storage device 150 and prints on the instructed printer 130, so that a print job is generated. Subsequently, the printing process 125
The generated print job is passed to the queue management unit 123.

The queue management unit 123 stores the delivered print job in the queue 124. The queue 124 is a queue of print jobs, in which print jobs are arranged in the order of printing, and the queue 12 corresponding to each printer
There are four. Note that the print job may have a priority. In this case, the queue management unit 123 determines the priority of the print job passed from the print process 125 and places the print job in an appropriate position in the queue 124. To store. When the generated print job is stored in the queue 124, the print process 125 ends the process.

In this embodiment, the printer 130 is set to 1
Since the example of only one unit is shown, the queue management unit 123
But if you have multiple printers,
It is possible to provide as many queue management units as the number of printers. Then, the print process 125 stores the generated job in the queue of the queue management unit corresponding to the designated printer. Further, one queue management unit is provided, and only the queues corresponding to the printers are provided, and one queue management unit receives the print job from the print process 125 and generates the print job in the queue corresponding to the instructed printer. Jobs can also be stored.

When the print job is stored in the queue 124, the print job sending unit 122 reads the print job from the queue 124 and sends the print job to any host to print the file 151 on the designated printer 130. The print job is transmitted to the determined host (print server 110) through the network communication unit 121. The print job transmission unit 122
All print jobs stored in the queue 124 are sequentially transmitted from the head of the queue 124. In addition, the network communication unit 121 performs protocol processing corresponding to the network and controls communication with other hosts connected to the LAN 100. After that, when the print job transmission unit 122 receives the reception confirmation response from the print server 110 through the network communication unit 121, the print job of which the reception is confirmed is deleted from the queue 124, and the transmission process is ended.

On the other hand, in the print server 110,
The print job receiving unit 112 is a network communication unit 111.
When the print job transmitted from the client 120 is received through the above, the print job is passed to the queue management unit 113. The network communication unit 111 performs protocol processing corresponding to the network and controls communication with other hosts connected to the LAN 100.

The queue management unit 113 stores the delivered print job in the queue 114. The queue 114 is a queue of print jobs, in which the print jobs are arranged in the order in which they are printed, and the queue 11 corresponding to each printer is provided.
There are four. It should be noted that the print job may have priority, and in this case, the queue management unit 113 determines the priority of the print job passed from the print job receiving unit 112 and sets the priority to the appropriate position in the queue 114. Stores print jobs.

When the print job transmitted by the client 120 is normally stored in the queue 114, the print job receiving unit 112 transmits a print job reception confirmation response to the client 120 via the network communication unit 111.
The process ends.

The print control unit 115 extracts the print job from the head of the queue 114, and the SCSI interface 1
40 to the printer 130.

In the printer 130, when the printer controller (PRC) 131 receives the print job from the print control unit 115 through the SCSI interface 140, it performs drawing processing and print processing, and the drawing print processing result is obtained through the printer engine interface 612. (Hereinafter referred to as drawing data) is the printer engine 1
Pass it to 32. The printer engine 132 controls the printer printing mechanism based on the passed drawing data,
Print.

The print control unit 115 deletes the print job from the queue 114 when the execution of the print job is completed normally. Regarding the completion of the print job, the print control unit 1
Alternatively, the print control unit 115 may determine that the print job is completed when the print job is completely transmitted to the printer 130. Alternatively, the print control unit 115 may inquire of the printer controller (PRC) 131. Alternatively, the printer controller (PRC) 131 may report to the printer controller (PRC) 131 to determine that the print job is completed when the completion of discharging the printed sheet from the printer is confirmed.

Next, referring to FIGS. 3 to 5, the operation of controlling the operation of the print server 110 at a remote place and the printer 130 connected to the print server 130, which is a feature of this embodiment, will be described with reference to FIGS. explain.

FIG. 3 is a diagram showing an example of the remote print control command.

In FIG. 3, the remote print control commands shown in No. 1 to No. 6 are for controlling the operation of the printer 130. The remote print control commands shown in No. 7 to No. 17 correspond to the lpc command that is conventionally used to control the operation of the lpd in the local host.
It is for controlling the operation of the lpd inside. In addition to this, various remote print control commands such as a command for requesting paper discharge from the printer 130 and a command for prioritizing a specific queue or print job may be provided.

The example of FIG. 3 also shows a command type code for identifying the type of each remote print control command and a response type code for identifying the response to each remote print control command.

FIG. 4 is a diagram showing an example of the format of the remote print control commands shown in FIG. 3 and the response to each remote print control command.

In FIG. 4, reference numeral 410 denotes the format of the remote print control command, which includes a command type code 411 indicating the command type, a print server name 412 and a printer name 413 controlled by the remote print control command, and remote print control. It is composed of a client name 414 that issued the command and a user name 415. The command type code 411 is shown in FIG.
A command type code corresponding to each remote print control command is set. The job number 416 is used to indicate the job number of the moving print job in the “topq command” shown in No. 16 of FIG. The job number 416 may be omitted depending on the type of remote print command.

Reference numeral 420 represents a response format, which is composed of a response type code 421 indicating a response type and a response code 422 indicating whether or not the remote print control command is normally accepted. The response information 423 is used to indicate the states of the print server 110 and the queue 114 in the response to the “status command” shown in No. 14 of FIG. 3, for example. The response information 423 is used to convey an additional message in response to another remote print control command, for example, to convey a message indicating that printing has been suspended by the remote print control command. You can also

FIG. 5 shows a sequence of remote print control commands and responses transferred over the LAN 100 when controlling the operations of the print server 110 and printer 130 from the client 120.

In the client 120, the remote printer control unit 126 creates a remote print control command 410 in response to a request from a user or a program and sends it to the print server 110 through the network communication unit 121 (S510).

In the print server 110, when the network communication unit 111 receives the control command 410 from the client 120, the received remote print control command 410 is passed to the operation control unit 116, and the received remote print control command 410 is received as described below. Print control command 410
Is performed (S520).

That is, the operation control section 116 first recognizes the type of the remote print control command 410 by the command type code 411, and then passes the remote print control command 410 to the authentication control section 117.

Authentication table 118 of authentication control unit 117
Stores the print server name and printer name,
Further, a client name and a user name permitted to issue a remote print control command are stored in association with each printer name. In order to limit the types of remote print control commands that are permitted to be issued for each client or user,
Further, the command type code may be stored in association with each client name and user name.

The authentication control unit 117 has the print server name 412, the printer name 413, and the client name 4 of the remote print control command 410 passed from the operation control unit 116.
14, the user name 415 is recognized, and the recognition result and the content of the authentication table 118 are compared and referenced to determine whether or not the execution of the remote print control command 410 is permitted, and the determination result is sent to the operation control unit 116. hand over. That is, for example, the print server name 412 is the print server 110.
If the printer name 413 indicates the printer 130 and the same client name as the client name 414 and the same user name as the user name 415 are stored in the authentication table 118, remote printing control is performed. It is determined that the execution of the command 410 is permitted. Also, for example, the client name 414 and the user name 41
If the same client name or user name as any one of 5 is stored in the authentication table 118, it may be determined that the execution of the remote print control command 410 is permitted.

A password may be included in the remote print control command 410. In this case, the password for permitting execution of the remote print control command 410 is stored in the authentication table 118. The authentication control unit 117 may permit execution of the remote print control command 410 if the passwords match.

Now, the operation control unit 116 has the authentication control unit 1
When the determination result passed from 17 indicates that the execution of the remote print control command 410 is permitted, the print job receiving unit 112 and the queue managing unit 113 are selected according to the previously recognized command type code 411. , Print control unit 1
15. At least one of the printers 130 and 130 is controlled to perform the operation as shown in FIG. When executing the remote print control command 410 shown in No. 1 to No. 6 of FIG. 3, the operation control unit 116 issues a command through the SCSI interface 140 to directly control the operation of the printer 130.

When the execution of the remote print control command 410 is completed, the operation control section 116 generates a response 420 to the remote print control command 410, and the response code 422 indicates that the remote print control command 410 has been normally accepted. The code shown is described and transmitted to the client 120 through the network communication unit 111 (S530).

On the other hand, the operation control unit 116 has the authentication control unit 1
When the determination result passed from 17 indicates that the execution of the remote print control command 410 is not permitted,
A response 420 to the remote print control command 410 is generated, a code indicating that acceptance of the remote print control command 410 is not permitted is described in the response code 422, and the response code 422 is transmitted to the client 120 through the network communication unit 111 ( S530).

Next, a second embodiment of the present invention will be described with reference to FIG.

The present embodiment is an embodiment in which clients share a printer connected to a network, and a printer controller (PRC) inside the printer.
In this embodiment, the print server function is provided.

FIG. 6 is a block diagram of a remote printing system according to the second embodiment of the present invention.

The structure of the client 120 is exactly the same as that of the first embodiment.

On the other hand, the network printer 610 is
It is composed of an RC 131 and a printer engine 132, and receives a print request from the client 120 to perform printing.

The PRC 131 further includes the client 1
Network communication unit 111 for controlling communication with
A print job receiving unit 112 that receives a print job sent from the client 120, a queue 114 that is a queue for print jobs, storage / deletion of print jobs in the queue 114, and print jobs in the queue 114. According to a remote print control command issued from the client 120, a print control unit 115 for executing a print job, a print control unit 115 for executing a print job, a print control unit 115 for executing a print job and a print job. Receiver 112, queue manager 113, print controller 1
15, drawing / printing execution unit 611, printer engine 132
Operation control unit 116 for controlling the operation of the client 1 and the client 1
The authentication control unit 117 permits execution of the remote print control command issued from the server 20.

The printer engine 132 controls the printer printing mechanism to perform printing.

In the present embodiment, the drawing / printing execution unit 611.
Is for performing drawing processing and printing processing that have been performed by a conventional printer controller (PRC), receives a print job from the print control unit 115, performs drawing processing and printing processing, and executes the printer engine interface 6
The drawing data is sent to the printer engine 132 through 12.

In this embodiment, the remote printing and remote printer 61 is operated by the same procedure as that of the first embodiment.
0 operation control is performed.

[0083]

As described above, according to the present invention,
Since the client can control the operation of the print server in the remote place and the printer connected to the print server, for example, when the print service is interrupted for printer maintenance, the print server in the remote place can be controlled. It is possible to perform an operation such as stopping the reception of the print job or interrupting the printing by the printer.

According to the present invention, the client is
Since the operation of the printer connected to the network can be controlled, it is possible to flexibly deal with various system configurations. In particular, a printer directly connected to the network or a printer connected to the network using a network printer adapter operates as a print server, but since it does not have a keyboard or monitor, it is possible to control the operation of such a printer. Although difficult, the present invention makes it possible to easily control the operation of such a printer.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a remote printing system according to a first embodiment of this invention.

FIG. 2 is a configuration diagram of a conventional remote printing system.

FIG. 3 is an explanatory diagram showing an example of a remote print control command.

FIG. 4 is an explanatory diagram showing formats of a remote print control command and a response.

FIG. 5 is an explanatory diagram showing a sequence of remote print control commands and responses.

FIG. 6 is a configuration diagram of a remote printing system according to a second embodiment of this invention.

[Explanation of symbols]

100, 200 ... LAN, 110, 210 ... Print server, 120, 220 ... Client, 130, 230
... printer, 610 ... network printer, 111,
121, 211, 221 ... Network communication unit, 12
2, 222 ... Print job transmission unit, 113, 123, 21
3, 223 ... Queue management unit, 114, 124, 214,
227 ... Queue, 125, 224 ... Printing process, 12
6 ... Remote printer control unit, 150, 225 ... External storage device, 151, 226 ... File, 112, 212 ...
Print job receiving unit, 115, 215 ... Print control unit, 11
6 ... Operation control unit, 117 ... Authentication control unit, 118 ... Authentication table, 131, 231 ... Printer controller (PR
C), 611 ... Drawing print execution unit, 612 ... Printer engine interface, 132, 232 ... Printer engine, 410 ... Remote print control command, 411 ... Command type code, 412 ... Print server name, 413 ...
Printer name, 414 ... Client name, 415 ... User name, 416 ... Job number, 420 ... Response, 421 ... Response type code, 422 ... Response code, 423 ... Response information.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takuya Shimakawa, 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Pref., Hitachi, Ltd. Microelectronics Equipment Development Laboratory (72) Inventor Naomi Tamura, Ebina, Ebina, Kanagawa Prefecture Address 810, Hitachi, Ltd. Office Systems Division

Claims (9)

[Claims] 1. A network, a plurality of computers connected to the network and communicating with each other, and a printer connected to at least one computer (hereinafter referred to as a print server) of the plurality of computers. In a remote printing system in which a computer other than the print server (hereinafter, referred to as a client) of the plurality of computers sends a print job to the print server to share the printer and perform printing, The client includes a remote printer control unit that transmits a control command describing commands for controlling the print server and the printer to the print server, and the print server receives a print job by a print job receiving unit. And the print job A queue management unit that manages a queue that is a matrix, and a print control unit that controls the operation of the printer, further receive the control command, and based on the command described in the received control command, A remote printing system comprising: an operation control unit that controls an operation of at least one of the print job reception unit, the queue management unit, the print control unit, and the printer. 2. The remote printing system according to claim 1, wherein the operation control unit controls the operation of the printer so as to perform the printing, or the printing so as to enable / disable the reception of the print job. The print control for controlling the operation of the job receiving unit, controlling the operation of the queue managing unit for changing the order of the print jobs in the queue, or starting the print / stopping the print / suspending the print / resuming the print A remote printing system characterized by controlling the operation of parts. 3. The remote printing system according to claim 1, wherein the print server stores a client and / or a user of the client who is permitted to control the operation of the print server and the printer. An authentication control unit having an authentication table, and the authentication control unit executes the control command when the client that is the sender of the control command and / or the user of the client is stored in the authentication table. The remote printing system, wherein the operation control unit performs an operation based on a command described in the received control command when the authentication control unit authenticates the control command. 4. A network printer connected to a network to which a plurality of computers are connected manages a print job receiving unit that receives a print job sent from the computer and a queue that is a queue of print jobs. A queue management unit and a print control unit for performing printing on the printer are further provided, and a control command sent from the computer in which an instruction for controlling the network printer is described is received, and the received control command is received. A network printer comprising: an operation control unit that controls the operation of at least one of the print job receiving unit, the queue management unit, and the print control unit based on the command described in 1. 5. The network printer according to claim 4, wherein the operation control unit controls the operation of the print job receiving unit to enable / disable the reception of the print job, or prints in the queue. A network printer characterized in that the operation of the queue management unit is controlled so as to change the order of jobs, or the operation of the print control unit is controlled so as to start / stop printing / suspend printing / resume printing. 6. A network comprising the network printer according to claim 4 or 5 and a plurality of computers connected to the network and communicating with each other, wherein the computer sends a print job to the network printer. Thus, in the remote printing system for performing printing by sharing the printer, the computer includes a remote printer control unit for transmitting the control command to the network printer. 7. The remote printing system according to claim 6, wherein the network printer stores an authentication table storing a client and / or a user of the client who is permitted to control the operation of the network printer. An authentication control unit having, wherein the authentication control unit authenticates the control command when the client and / or the user of the client who is the sender of the control command is stored in the authentication table, and The remote printing system, wherein the control unit performs an operation based on a command described in the received control command when the authentication control unit authenticates the control command. 8. The remote printing system according to claim 3, wherein the contents of the authentication table can be registered / changed from the outside. 9. The remote printing system according to claim 1, 2, 3, 6, 7 or 8, wherein the remote printer control unit operates when an external instruction is given. .