ทดสอบบน Red Hat 7.7
The pgrep command allows a user to find process IDs in the running program in the system’s current state.
$ pgrep --version pgrep from procps-ng 3.3.10
$ pgrep --help
Usage:
pgrep [options] <pattern>
Options:
-d, --delimiter <string> specify output delimiter
-l, --list-name list PID and process name
-a, --list-full list PID and full command line
-v, --inverse negates the matching
-w, --lightweight list all TID
-c, --count count of matching processes
-f, --full use full process name to match
-g, --pgroup <PGID,...> match listed process group IDs
-G, --group <GID,...> match real group IDs
-n, --newest select most recently started
-o, --oldest select least recently started
-P, --parent <PPID,...> match only child processes of the given parent
-s, --session <SID,...> match session IDs
-t, --terminal <tty,...> match by controlling terminal
-u, --euid <ID,...> match by effective IDs
-U, --uid <ID,...> match by real IDs
-x, --exact match exactly with the command name
-F, --pidfile <file> read PIDs from file
-L, --logpidfile fail if PID file is not locked
--ns <PID> match the processes that belong to the same
namespace as <pid>
--nslist <ns,...> list which namespaces will be considered for
the --ns option.
Available namespaces: ipc, mnt, net, pid, user, uts
-h, --help display this help and exit
-V, --version output version information and exit
For more details see pgrep(1).
ตัวอย่าง
หา process ID ของ nginx
$ pgrep nginx 1085 1086
specify output delimiter ด้วย -d
$ pgrep -d: nginx 1085:1086
match exactly with the command name ด้วย -x
$ pgrep -x nginx 1085 1086
หา process ID จาก user name
$ pgrep -u jack