ps(1)

ps [opt]
-  opt:
-    --no-header .... do not print column header
-    -o <OUT> ....... comma separated list of output columns
-    -p <PID> ....... only show pid
-    -C <name> ...... only show processes matching name
-    -T ............. list threads
-    --signames ..... use short signames instead bitmasks
-

-
Set PS_FORMAT env variable to setup default output columns.
-

Frequently used output columns

pid        process id
-ppid       parent process id
-pgid       process group id
-tid        thread id
-
-comm       name of process
-cmd        name of process + args (full)
-
-etime      elapsed time (since process started)
-user       user owning process
-thcount    thread count of process
-nice       nice value (-20 highest priority to 19 lowest)
-
-pcpu       cpu utilization (percent)
-pmem       physical resident set (rss) (percent)
-rss        physical memory (in kb)
-vsz        virtual memory (in kb)
-
-sig        mask of pending signals
-sigcatch   mask of caught signals
-sigignore  mask of ignored signals
-sigmask    mask of blocked signals
-

Example: Use output for scripting

for tid in $(ps -o tid --no-header -T -p 31084); do
-    taskset -c -p $tid;
-done
-

Example: Watch processes by name

watch -n1 ps -o pid,pcpu,pmem,rss,vsz,state,user,comm -C fish
-

Example: Show signal information

# With signal masks.
-ps -o pid,user,sig,sigcatch,sigignore,sigmask,comm -p 66570
-
-# With signal names.
-ps --signames -o pid,user,sig,sigcatch,sigignore,sigmask,comm -p 66570
-

- -

Notes

ps(1)

Example: Use output for scripting

Example: Watch processes by name

Example: Show signal information