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Linux in a Nutshell

This directory of Linux commands is from Linux in a Nutshell, 5th Edition.

Click on any of the 687 commands below to get a description and list of available options. All links in the command summaries point to the online version of the book on Safari Bookshelf.

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tunelp device [options]

System administration command. Control a line printer's device parameters. Without options, print information about device(s).


-a [on|off]

Specify whether or not to abort if the printer encounters an error. By default, do not abort.

-c n

Retry device n times if it refuses a character. (Default is 250.) After exhausting n, sleep before retrying.

-i irq

Use irq for specified parallel port. Ignore -t and -c. If 0, restore noninterrupt-driven (polling) action.

-o [on|off]

Specify whether to abort if device is not online or is out of paper.

-q [on|off]

Specify whether to print current IRQ setting.


Reset port.


Display printer's current status.

-t time

Specify a delay of time in jiffies to sleep before resending a refused character to the device. A jiffy is defined as either one tick of the system clock or one AC cycle time; it should be approximately 1/100 of a second.

-T [on|off]

Tell the lp driver whether it can trust the IRQ. Useful only if using with interrupts, to handle IRQ printing efficiently. Requires at least Linux 2.1.131.

-w time

Specify a delay of time in jiffies to sleep before resending a strobe signal.

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