How to use the Type command in Linux
This article will explain in detail how to use the Type command in Linux. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.
The type tool is used to display type information for commands. It will show how entering a given command on the command line will be interpreted.
How to use the type command
The type command is built into bash, and the type syntax:
Type [- afptP] [name...]
For example, look at the type of type:
[root@localhost ~] # type typetype is a shell builtin
You can also provide multiple parameters:
[root@localhost ~] # type vim sleep headvim is hashed (/ usr/bin/vim) sleep is / usr/bin/sleephead is / usr/bin/head
Type of command
The-t option tells type to print a word describing the type of command, which will be one of the following:
Alias-alias
Builtin-built-in command
File-Fil
Keyword-keyword
Here are some examples:
Alias
[root@localhost ~] # type-t lsalias# in Centos system, the command corresponding to ls alias is ls-- color=auto [root@localhost bin] # type lsls is aliased to `ls-- color=auto'
Builtin
[root@localhost] # type-t printfbuiltin
Printf is a built-in command for shell
File
[root@localhost] # type-t awkfile
Awk is an executable file
Keyword
[root@localhost] # type-t whilekeyword
While, for, if, else. Wait, it's a reserved keyword in Bash.
Displays the location and type of the command
Use the-a command to display the location and type of the command:
[root@localhost ~] # type-a lsprintf awk whilels is aliased to `ls-- color=auto'ls is / usr/bin/lsprintf is a shell builtinprintf is / usr/bin/printfawk is / usr/bin/awkwhile is a shell keyword
This example shows the type and location of the ls,printf,awk,while command after execution.
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