pkill -HUP sshd #reread sshd configuration file

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The first process that starts when Linux System is booted is – init process, hence it is assigned a value of ‘1‘ in most of the cases.

pgrep, pkill - look up or signal processes based on name and other
pkill -HUP sshd #reread sshd configuration file
pkill -KILL -u vivek php-cgi #kill processes whose effective user id is set to vivek

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