Re: Basic ps Tips

Jerry Peters <jerry@example.invalid> wrote:

Lawrence D'Oliveiro <ldo@nz.invalid> wrote:

On Sat, 27 Jul 2024 00:40:49 -0000 (UTC), I wrote:

[...]

    ps -p$(pgrep -d, bash) -wwo pid,ppid,lstart,tty,etime,cmd
 
to report all the bash sessions I have running (quite a lot). The ???ww???
says not to truncate the output, which is handy for long command lines.

 
Or just use ps -C <command>:

[...]

Does noone know about -C? I keep seeing things like 'ps -ef | grep
<something> in scripts to see if <something is running, rather than
using 'ps -C'.

I did not know about it.

The man page on OpenBSD does not mention -C, but calling 'ps -C' does
not give an error. But:
#v+
$ ps -C ksh
ps: /dev/mem: Permission denied'
#v-

Dunno what to make out of it, but apparently one reason to use grep
instead of -C is portability.

        Jerry

Rene