spool queue examination
lpq examines the spooling area used by
lpd(8) for printing files on the line printer, and reports the status
of the specified jobs or all jobs associated with a user.
lpq invoked without any arguments reports on any
jobs currently in the queue.
The options are as follows:
- Report on the local queues for all printers, rather than just the specified printer.
- Information about each of the files comprising the job entry is printed. Normally, only as much information as will fit on one line is displayed.
- Specify a particular printer, otherwise the default line printer is used
(or the value of the
PRINTERvariable in the environment). All other arguments supplied are interpreted as user names or job numbers to filter out only those jobs of interest.
For each job submitted (i.e., invocation of
lpq reports the user's name, current
rank in the queue, the names of files comprising the job, the job identifier
(a number which may be supplied to
lprm(1) for removing a specific job), and the total size in bytes.
Job ordering is dependent on the algorithm used to scan the spooling
directory and is supposed to be FIFO (First In First Out). File names
comprising a job may be unavailable (when
lpr(1) is used as a sink in a pipeline) in which case the file is
indicated as “(standard input)”.
lpq warns that there is no daemon
present (i.e., due to some malfunction), the
lpc(8) command can be used to restart the printer daemon.
If the following environment variables exist, they are used by
- If set to a positive integer, output is formatted to the given width in
lpqdefaults to the terminal width, or 80 columns if the output is not a terminal.
- Specifies an alternate default printer.
- To determine printer characteristics.
- The spooling directory, as determined from printcap.
- Control files specifying jobs.
- The lock file to obtain the currently active job.
Unable to open various files. The lock file being malformed. Garbage files when there is no daemon active, but files in the spooling directory.
lpr(1), lprm(1), lpc(8), lpd(8)
lpq appeared in
Due to the dynamic nature of the information in the spooling
lpq may report unreliably. Output
formatting is sensitive to the line length of the terminal; this can result
in widely spaced columns.