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Ps show processes that were not started by INIT and are not kernel processes

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Posted on: 11 May 2008
Author: mandrei
Section: Server Operating Systems | Administration Guides
Views: 946
Comments: 0 (Add)

Ps show processes that were not started by INIT and are not kernel processes
Ps show processes that were not started by INIT or are not kernel processes in FreeBSD, ps show processes, ps filter processes

 



Ps show processes that were not started by INIT or are not kernel processes in FreeBSD

I'll start with a short intro from man ps:

PS(1) FreeBSD General Commands Manual PS(1)

NAME
ps -- process status

SYNOPSIS
ps [-aCcefHhjlmrSTuvwXxZ] [-O fmt | -o fmt] [-G gid[,gid...]] [-M core]
[-N system] [-p pid[,pid...]] [-t tty[,tty...]] [-U user[,user...]]
ps [-L]

DESCRIPTION
The ps utility displays a header line, followed by lines containing
information about all of your processes that have controlling terminals.

A different set of processes can be selected for display by using any
combination of the -a, -G, -p, -T, -t, and -U options. If more than one
of these options are given, then ps will select all processes which are
matched by at least one of the given options.

For the processes which have been selected for display, ps will usually
display one line per process. The -H option may result in multiple out-
put lines (one line per thread) for some processes. By default all of
these output lines are sorted first by controlling terminal, then by
process ID. The -m, -r, -u, and -v options will change the sort order.
If more than one sorting option was given, then the selected processes
will be sorted by the last sorting option which was specified.
The options are as follows:

-a Display information about other users' processes as well as your
own. This will skip any processes which do not have a control-
ling terminal, unless the -x option is also specified. This can
be disabled by setting the security.bsd.see_other_uids sysctl to
zero.
-l Display information associated with the following keywords: uid,
pid, ppid, cpu, pri, nice, vsz, rss, mwchan, state, tt, time, and
command.
-x When displaying processes matched by other options, include pro-
cesses which do not have a controlling terminal. This is the
opposite of the -X option. If both -X and -x are specified in
the same command, then ps will use the one which was specified
last.

The following command will show processes that are not kernel processes and were not started by INIT(useful to monitor user-space processes).

# ps walx | awk '$3 != "1" && $3 != "0"'
UID PID PPID CPU PRI NI VSZ RSS MWCHAN STAT TT TIME COMMAND
0 86686 86381 0 76 0 1536 516 select S ?? 0:00.01 supervise dnscache
0 86916 86381 0 76 0 1536 516 select S ?? 0:00.01 supervise log
0 87232 86381 0 76 0 1536 516 select S ?? 0:00.01 supervise tinydns
0 87437 86381 0 76 0 1536 516 select S ?? 0:00.01 supervise log
3 88083 86916 0 -8 0 1512 484 piperd S ?? 0:00.29 multilog -*
3 88259 87437 0 -8 0 1512 496 piperd S ?? 0:00.02 multilog t ./main
1002 30129 27685 0 8 0 3684 2072 wait S p0 0:00.02 /usr/local/bin/bash
0 85451 30496 0 76 0 1796 932 - R+ p0 0:00.00 ps walx
0 85652 30496 0 76 0 1804 896 - R+ p0 0:00.01 awk $3 != "1" && $3 != "0"
0 69392 67771 0 5 0 3712 1924 ttyin Ss+ p4 0:00.02 /usr/local/bin/bash

 This works mainly on FreeBSD. 

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