The usage of the Linux basic command pidof

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Pidof

Pidof can find the pid of a process with a specified name and send the results to standard output. Pidof has two return values: 0, at least one process is found, and 1, no process is found. Pidof is actually the same as killall5; the program operates according to the name that calls it.

The scope of this command: RedHat, RHEL, Ubuntu, CentOS, SUSE, openSUSE, Fedora.

1. Grammar

Pidof [options] name

2. List of options

Option

Description

S

Respond to only one process number at a time

-c

Only processes running in the root directory are displayed. This option is valid only for root users.

-o

Ignore the process with the specified process number

-x

Also show the same name in the shell script run

3. Examples

1) View the id of the specified process

[root@localhost ~] # pidof bash / / shows the id of the bash process, with two

8563 8266

2) display only one process at a time

[root@localhost ~] # pidof-s bash / / shows only one process id

8563

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