Linux Learning: Chapter Three-linux common commands -2__linux

A file Operation command

1 Create an empty file or modify the file time

Touch filename

Command name: Touch

Path to command:/bin/touch

Execute Permissions: All Users

2) Delete

RM-RF file name

-R Delete Directory

-F Coercion

Command name: RM

Command English original intention: remove

Path to command:/BIN/RM

Execute Permissions: All Users

3 Cat file name to view the contents of the file. Through

Command name: Cat

Path to command:/bin/cat

Execute Permissions: All Users

-N List Line numbers

4) More File name screen display file content

Command name: more

Path to command:/bin/more

Execute Permissions: All Users

Space to page DOWN b page UP Q exit

6) Head FileName Display file header

Command name: Head

Path to command:/usr/bin/head

Execute Permissions: All Users

Head-n Row Number file name specifies the first few lines of the file to display

head-n 20 filename

HEAD-20 file name

7) Tail file name display end

CTRL + C forced termination

Ctrl+l Clear Screen

8) Symbolic Link file

ln

Command name: LN

Command English original intent: Link

Path to command:/BIN/LN

Execute Permissions: All Users

Shortcut

New links, taking different hard drive locations

Modify either file, both changes

Delete source file, soft connection not open

Ln-s source file file name must write absolute path

Two commands that both files and directories can operate

1 RM Delete files or directories

2) Copy

Command name: CP

Command English original intention: copy

Path to command:/BIN/CP

Execute Permissions: All Users

CP Source file target Location

-R Replication Directory

-P Joint File property copy

-D If the source file is a linked file, copy the link property

-A equivalent to-PDR

CP AA/TMP/AA formerly replicated

CP aa/tmp/bb renamed Replication

3) Cut or renamed

Command name: MV

Command English original meaning: move

Path to command:/BIN/MV

Execute Permissions: All Users

MV Source file target location

mv/root/aa/tmp/

MV AA BB

Three Rights Management

1 Permission Bits

-rw-r--r--1 root 0 08-11 01:45 AA

Permission bit is 10-bit

First: Representing file types

-Common documents

D Catalog Files