What is the purpose of the 'which' command in Linux?

The which command in Linux is used to locate the executable file associated with a given command. It searches the directories listed in the user's PATH environment variable and returns the path of the executable that would have been executed if the command had been entered in the terminal.

Example Usage:

which python

This command will return the path to the Python executable if it is installed and available in the PATH. If the command is not found, it will not return any output.