Linux Common Commands--which

which 显示命令的全路径（查看二进制命令的所在位置，从 PATH 变量所在的路径查找）

Syntax format: which "option" "Prcgramname" echo [options] [command name]
Attention:
The 1.which command and the following options and command names must have at least one space between each element
The 2.which command is used to find the specified command in the PATH environment variable
Common parameters:-A
Description: The default after PATH after the summary and go to find the command if the search found, stop matching. Use the-a option to traverse all PATH commands and output all occurrences.
Case one:
Finds the full path of the specified command


Note: The which command can also display the alias of its find command and whether it is a built-in command

Linux Common Commands--which