Linux Foundation II

Source: Internet
Author: User

Linux Command classification

Internal command: belongs to Shell interpreter

External command: independent of Shell interpreter

Check command type

Type: Check the types of command words

[[Email protected] ~]# type ls

LS is an alias of ' LS--color=auto '

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Type meaning

Builtin commands created inside the shell

file disk files, external commands

Alias Command aliases

Keyword reserved keywords

function Shell functions

Not found not found, unrecognized

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Man xxx See more help

Press G to scroll to the beginning

Press G to scroll to the end

Uppercase N jump up match

lowercase n jumps down

Enter/x to find this option for-X

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Ls

Format: LS-[option] [directory or file name]

-L: Display in long format

-A: Shows hidden directories. The other is the same as-a

-D: Show the directory itself instead of the content

-H: Provides easy-to-read capacity units

-R: Recursive display of content

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Alias: Create your own commands

Alias xx= ' LS-LHD '

Unalias XX Delete the command you created XX

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Du

Format: du-[Options] [directory or file]

Common Command options:

-A: Statistics all files, not only statistics directory

-S: Count only the total amount of space that is given to a parameter

-H: Provides easy-to-read capacity units (K m, etc.)

[Email protected] Desktop]# du-sh/boot//etc/pki/

116m/boot/

1.5m/etc/pki

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mkdir: Creating a Folder

Format: mkdir [file name] [/path/] Directory name

-P: Continuous creation of directories

[[Email protected] Desktop]# Mkdir/root/hydra

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Touch: Create a text file

Format: Touch file name

[email protected] ~]# Touch xxx.txt

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MV: Move/rename (path unchanged is renamed)

Format: MV-[option] Original file destination path

-F: Do not prompt

[[email protected] ~]# Touch 1.txt

[Email protected] ~]# mkdir 1

[[email protected] ~]# Touch 1.txt

[[email protected] ~]# ls

1 anaconda-ks.cfg initial-setup-ks.cfg template picture Download desktop

1.txt help.php Public Video document music

[Email protected] ~]# MV/ROOT/1.TXT/ROOT/1

[[email protected] ~]# ls

1 help.php Public video document music

anaconda-ks.cfg initial-setup-ks.cfg template Picture Download desktop

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RM: Delete

Format: RM-[option] file or directory

Common Command options:

-r: Recursively delete entire Directory

-F: Forced delete, not prompt (vs. i)

[Email protected] ~]# RM-RF xxx.txt

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Ln-s Creating a Connection file

Format: LN [-S] Source File connection file path

[[email protected] ~]# cat/etc/redhat-release (source file)

Red Hat Enterprise Linux Server Release 7.2 (MAIPO)

[[email protected] ~]# ln-s/etc/redhat-release/xx (Connect source file path and create shortcut)

[Email protected] ~]# ls/xx

/xx

[Email protected] ~]# ls-l/xx

lrwxrwxrwx. 1 root root 19 May 14:50/xx-/etc/redhat-release

[Email protected] ~]#

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CP: Copy

Format: CP-[option] Original file destination path

Common Command options:

-r: Recursively copy entire Directory

-F: Forced override

-P: Keep the properties of the original file unchanged

[Email protected]/]# cp-rfp/home/anonymous/boot/

[Email protected]/]# cd/boot/

[[email protected] boot]# ls

Anonymous

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Linux Foundation II

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