Linux which command

Linux which command is used to find files.

The which command will search for files in the directories set by the environment variable $PATH.

Syntax

which [file...]

Parameters:

-n<file name length> 　Specify the file name length, the specified length must be greater than or equal to the longest file name among all files.
-p<file name length> 　is similar to-n parameter is the same, but the <file name length> here includes the file path.
-w 　Specify the width of the output columns.
-V 　Display version information.

Use the command "which" to view the absolute path of the command "bash", input as follows:

$ which bash

After executing the above command, the output information is as follows:

/bin/bash                   #Absolute path of the bash executable program