Linux commands--Rights management commands

Linux commands--Rights management commands

Rights Management Command: chmod

English Name: chmod

Command English original:change the permissions mode of a file

Command path:/bin/chmod

Execute Permissions: All Users

Syntax: chmod "{ugoa}{+-=}{rwx}" "File or directory"

"mode=421" "File or directory"

-R Recursive modification

Function Description: Change file or directory permissions

Example: Way One:

chmod u+x japanlovestory.list Add an Execute permission to the Japanlovestory.list to the owner

chmod g+w,o-r Japanlovestory.list

chmod g=rwx Japanlovestory.list

Mode two: rwxrwxr--is represented by a number of 774

CHMOD 640 Japanlovestoryl.list The modified permission is rw-r-----

All files in chmod- R 777/tmp/a A directory will be changed to 777

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English Name: Chown

Command English original meaning:change file ownership

Command path:/bin/chown

Execute Permissions: All Users

Syntax: chown "user" "File or directory"

Function Description: Change the owner of a file or directory

Example: Chown Shenchao Fengjie Change the owner of the file Fengjie to Shenchao

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English Name: chgrp

Command English original meaning:change file grouP ownership

Command path:/BIN/CHGRP

Execute Permissions: All Users

Syntax: chgrp "user" "File or directory"

Function Description: Change the owning group of a file or directory

Example: Chgrp lampbrother fengjie Change file Fengjie belongs to group Lampbrother

Note: Who creates the file, who is the group that owns the file. Each file is created with a group that is the default group where the owner resides.

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English Name: umask

Command English original: Theuser file-creation mask

Command path: Shell built-in command

Execute Permissions: All Users

Syntax: umask "-S"

-S Displays the new file default permissions in rwx form

Function Description: Displays, sets the default permissions for the file.

Example: $ umask-s

　　　　

Linux commands--Rights management commands