My ps
command works except on a particular version on Linux as you can see below.
[root@failinghost ~]# ps -xef | grep -v grep | grep websphere
Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.8/FAQ
[root@failinghost ~]# ps -version
ERROR: Unsupported SysV option.
********* simple selection ********* ********* selection by list *********
-A all processes -C by command name
-N negate selection -G by real group ID (supports names)
-a all w/ tty except session leaders -U by real user ID (supports names)
-d all except session leaders -g by session OR by effective group name
-e all processes -p by process ID
-q by process ID (unsorted & quick)
T all processes on this terminal -s processes in the sessions given
a all w/ tty, including other users -t by tty
g OBSOLETE -- DO NOT USE -u by effective user ID (supports names)
r only running processes U processes for specified users
x processes w/o controlling ttys t by tty
*********** output format ********** *********** long options ***********
-o,o user-defined -f full --Group --User --pid --cols --ppid
-j,j job control s signal --group --user --sid --rows --info
-O,O preloaded -o v virtual memory --cumulative --format --deselect
-l,l long u user-oriented --sort --tty --forest --version
-F extra full X registers --heading --no-heading --context
--quick-pid
********* misc options *********
-V,V show version L list format codes f ASCII art forest
-m,m,-L,-T,H threads S children in sum -y change -l format
-M,Z security data c true command name -c scheduling class
-w,w wide output n numeric WCHAN,UID -H process hierarchy
[root@failinghost ~]# ps -V
procps version 3.2.8
[root@failinghost ~]# uname -a
Linux failinghost 2.6.32-754.28.1.el6.x86_64 #1 SMP Fri Jan 31 06:05:42 EST 2020 x86_64 x86_64 x86_64 GNU/Linux
Below is another Linux host where I thankfully don't get the error:
[root@workinghost ~]$ ps -xef | grep -v grep | grep websphere
[root@workinghost ~]$ echo $?
1
[root@workinghost ~]$ uname -a
Linux workinghost 3.10.0-1062.1.2.el7.x86_64 #1 SMP Mon Sep 16 14:19:51 EDT 2019 x86_64 x86_64 x86_64 GNU/Linux
[root@workinghost ~]$ ps -V
procps-ng version 3.3.10
I wanted my ps command to work on all non-Solaris.
Can you please suggest a solution that works on both the Linux versions?
ps -xef
have no output? Do all of its output lines contain the stringgrep
? Does its output just not includewebsphere
? More importantly, why aren't you usingpgrep
? – terdon Aug 06 '20 at 08:55