Bash : pgrep

pgrep: 等价于 ps -ef | egrep

# ps -ef | egrep '^root ' | awk '{print $2}' | awk '{printf("%s,",$1)}'
1,2,3,4,5,20,21,38,39...

可以使用pgrep，显示所有root帐号下的进程，并用逗号隔开：

# pgrep -d, -u root
1,2,3,4,5,20,21,38,39...

pgrep looks through the currently running processes and lists the process IDs which matches the selection criteria to stdout.All the criteria have to match.For example,

pgrep -u root sshd

will only list the processes called sshd AND owned by root. On the other hand,

pgrep -u root,daemon

will list the processes owned by root OR daemon.

pkill will send the specified signal (by default SIGTERM) to each process instead of listing them on stdout.

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