How to Use 'ps -ef | grep' to Find Processes in Linux

The 'ps -ef | grep' command is used to list all running processes on a Unix-like system and filter the output based on a specific keyword or pattern. The 'ps -ef' command lists all processes, and the '|' (pipe) symbol redirects the output to the 'grep' command, which filters the output based on the provided keyword or pattern.

For example, if you want to find all processes containing the word 'apache', you can use the following command:

ps -ef | grep apache

This will display all processes with 'apache' in their name or command.