Introduction
pidofCommands are used to findLinuxThe process of running programsID (PID). It helps manage and control processes.
Basic syntax
pidof [options] program_name
Common options
-s: Single time - Indicates that the program returns only one pid-q: Quiet mode, suppresses any output and sets exit status only accordingly-w: Also displays processes without visible command lines (such as kernel worker threads)-x: This will cause the program to return to running the specified script as wellshellProcess ID-o <omitpid>:TellpidofIgnore processes with this process ID-t: Show all thread ids instead of pid-S <separator>: Use the specified delimiter as the delimiter between pids. Use only if multiple pids are printed for the program
Example usage
Get the PID of the running program
pidof bash # Sample output: 1234
Get the PID of multiple instances
pidof firefox # If multiple instances are running, it will return multiple PIDs: 4567 8901
Get the PID of the system daemon
pidof systemd
Show only one PID
pidof -s python
Exclude specific PIDs
pidof -o 4567 firefox
Includes Shell scripts
pidof -x # Find the PID of scripts and programs
Use ps with grep
ps aux | grep nginx | grep -v grep
Using pgrap
pgrep nginx
Use ps with awk
ps -e | awk '/nginx/ {print $1}'
Use pidof to terminate the process
kill $(pidof firefox)
Restart the process
kill -HUP $(pidof nginx)
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