Basic commands for Linux classes

1.mkdir Creating a Directory

Create directory ===> make directory ====> mk dir ====>mkdir

Mkdir/data

-p recursively Create a directory

2.ls list lists contents in directory

-L (letter) long format, details

-D directory to view directories (treats directories as normal files)

3.CD entering the directory chage directory changes the currently in use catalog

Cd/data

4.pwd Compass, display your current location, print working directory prints the current working directory

5.touch Touch, create file (timestamp of modified file)

-D time to modify files when creating files

Example: touch-d "2016-10-1 15:08:29" Test.log

Text Editor for 6.vi/vim commands

VI equivalent to: Windows Notepad

Vim equivalent: notepad++ emeditor

Use VI to open oldboy.txt

VI Oldboy.txt

The default is command mode.

a/i ===>insert Edit Mode ====> then enter text

I am studying Linux.

Press the ESC key again to enter command mode

: Wq

W Write

Q quit

: q!

7. Echo Output to the screen

8. Cat View File contents

Multi-line Append

Cat >>/data/oldboy.txt<<eof

I

Am

Studying

Linux

Eof

9.CP copy copy files or directories can only be copied by default

-A = = =-pdr

-p copy files while keeping the file attributes unchanged, the measurements of the last toilet person is unchanged

-R recursive replication, directory and future generations

10.MV move moving files or directories

-T moves all the original parameters to the

11.RM Deleting files or directories

-F Force forcibly removed, no prompt displayed

-R Recursive recursive delete, delete directory

12.find Finding files or directories

find/data/-type f-name "*.txt"

Where to find the type name of the file

-type Type F (plain file) d (Directory directory)

13.head header Default display file header (front) 10 lines

-N Number first few lines-number

-n2 <===>-2

14.tail tail displays the following 10 lines of the file by default

-N Numbers <===>-numbers represent the following lines of a file

15.grep Sieve, filter Linux Three Musketeers old three

-V to reverse, exclude you from filtering, print mismatched

-A after displays the following 10 rows of the matching row

-B before display the first 10 rows of the matching row

-C 5 Context displays 5 rows before and after matching rows

[[email protected] data]# grep "Oldboy" test.txt

Oldboy

[Email protected] data]# grep-v "Oldboy" test.txt

Test

Liyao

]

16.sed Stream Editor Editor Linux The Three Musketeers are good at fetching.

'/oldboy/d ' Find the row containing the Oldboy, and then delete the line

Delete

-N Cancel the default output-n '//p '

-I modify the file

#查找替换

' S#oldboy#oldgirl#g '

s## #g

[Email Protected]@@g

S///g

17.awk Linux Three Musketeers boss is good at fetching columns

NR line number

&& and

18.alias setting aliases, aliases for commands

Alias rm= ' echo do not use RM command. '

Ways to cancel Aliases

1. \CP

2./bin/cp

3.unalias

19.which path of the command to find (absolute path)

20.SEQ generating sequence sequence number sequence

SEQ 100

21.netstat Net Stat network status

Netstat-lntup View service port number

[Email protected] ~]# Netstat-lntup|grep 22

TCP 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 7823/sshd

TCP 0 0::: $:::* LISTEN 7823/sshd

22.source/. (dot) to make the specified configuration file effective

/etc/profile/etc/bashrc

/etc/sysconfig/i18n

23.uname viewing System Information kernel version

-R kernel Version number

-M displays 32-bit 64-bit architecture information

24.ifconfig viewing NIC Information

Ifconfig eth0

25.ifup start a block NIC

Ifdown Closing a block NIC

Ifdown eth0 && ifup eth0 # #重启某一个块网卡

Ifdown eth0

Ifup eth0

26.setenforce Setting SELinux Status

0 ===>permissive only print warning, equivalent to Disabled

1 ===>enforcing SELinux Open

Getenforce Get SELinux status

27.runlevel View current Run level

28.init Switching Operation level

29.useradd adding users

30.PASSWD Modify user password, the default is to modify the current user

passwd Oldboy

--stdin reading a password from a pipe or standard input

echo 123456|passwd--stdin Oldboy #非交互式设置密码

31.SU Switch User Switching users

Su vs Su-difference

32.whoami querying the user of the current user

33.history View command History commands

-C Clears all history commands

-D Number Delete a history command

~/.bash_history

Yum Linux (RPM package) software management tools

Yum install-y tree Dos2unix nmap Lrzsz

Y for all the things you need to confirm, give yes.

Repolist viewing the Yum source used by the current system

35.shutdown Shutdown Restart Server

-H time Halt shutdown now

-R Time reboot Restart now

36.mount mount Apple (device) mounted to tree (mount point, directory)

mount/dev/cdrom/mnt/

Device mount point directory entry

37.DF command to view disk space usage

-H human-readable Human readable

#linux下面查询帮助的方法

1.man command

2. Command--help

###

mv/data/root/

1. Generally indicates the contents of the directory itself and below the directory

mv/data//root/

2. Generally indicates the contents below the directory

# # #特殊符号

1.. (dot) indicates the current directory/path

2 ... Represents the parent directory of the current directory

3. # indicates comments (Linux ignores, skips)

4. "(anti-quote) <===> $ () to reference the result of the command, execute the command

# # #快捷键

1.ctrl+l Clear Screen

2.ctrl+c Cancel, Revoke

3.esc+. (point) using the last parameter of the previous command

4.ctrl+d Logout exiting the current user

This article from "12097308" blog, declined reprint!

Basic commands for Linux classes