The which command in Linux is a useful toolkit that allows users to locate the relevant executable file for a specific command that you want to execute.
It searches for the file in the directories listed in the $PATH variable, where the executables are usually stored.
The syntax of which is simple, using which [file1] [file2], etc.
Replace [file1] and [file2] with the names of the executables that you are looking for.
There are many uses for this tool, including checking for the existence of a command and determining whether the command is an executable, an alias, or a symbolic link.
It can also show all of the locations of a command, rather than just the first match, by using the -a option.
However, it is important to note that the which command does not recognise built-in commands, differentiate between binary and symbolic links, or search outside of the $PATH directories.
