Linux which command

Linux which command is used to locate the file.

instruction which will locate the matching files in the environment variable $ PATH directory set in.

which [文件...]

Parameters:

-n <file name length> Specify the file name length, the length specified must be greater than or equal to the longest of all the files in the file name.
-p <file name length> and -n parameters the same, but where <filename length> including the path to the file.
-w Specifies the width of the output field.
-V Display version information.

Using the command "which" view instruction "bash" absolute path, enter the following command:

$ which bash

After the above instruction is executed, the output information is as follows:

/bin/bash                   #bash可执行程序的绝对路径

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