Hadoop diary Day6---common commands for Linux

Source: Internet
Author: User

First, the system operation (boot, shutdown, landing, etc.) command

Option name

Use formatting

Meaning

Reboot

Enter the carriage

Restart now

Shutdown

Shutdown–r now

Restart now

Shutdown–r 20:35

20:35 restart

Shutdown–r 10

Restart after 10 minutes

Halt

Enter the carriage

Shut down now.

Shutdown

Shutdown–h now

Shut down now.

Shutdown–h 20:35

20:35 Turn off the machine

Shutdown–h 10

20:35 Turn off the machine

Exit

Enter the carriage

Exit

Second, file directory operation

Option name

Use formatting

Meaning

Cd

CD [DirName]

Jump directory to DirName

DirName

As the path name

Absolute path

A path name that begins with "/", such as/root

Cd/root

Jump to the root directory that is your own homedirectory

There are C disk D drives under Win7, but Linux has only one root directory-"/", while "~" represents the user's home homedirectory, i.e. "/" + "user" record

"/" root directory Top level

CD/

Jump to the root directory, which is the top level directory

Relative path

“.” or null character

CD. or CD

Jump to current directory

“..”

Cd..

Skip to top level directory

"~" or "~/"

Represents the Host Directory

/root/file=~/file

~

CD ~

Jump to HomeDirectory

Pwd

Pwd

Show current path name

Ls

Ls–a

All files listed under the directory include hidden

Ls–l

List the details of a file

Ls–f

Viewing files in a directory

ll

LL's not an order, it's Ls-l's nickname.

List the details of a file

Mkdir

mkdir Dir1

Create a directory called ' Dir1 '

mkdir Dir1 Dir2

Create two directories at a time

Mkdir-p/tmp/dir1/dir2

Create a directory tree

Rm

Rm-f file1

Delete a file called ' File1 '

RM-RF Dir1 Dir2

Delete two directories and their contents at the same time

RM-RF Dir1

Delete a directory called ' Dir1 ' and delete its contents at the same time

RmDir

RmDir Dir1

Delete a directory called ' Dir1 ', can only delete empty directory, cannot delete directory with files

Mv

MV Dir1 New_dir

Rename/move a directory Dir1 to New_dir

Cp

CP file1 File2

Copy a file content to File2

CP dir/*.

Copy all files under a directory to the current working directory

Cp-a/tmp/dir1.

Copy a directory to the current working directory

Cp-a Dir1 Dir2

Copy a directory

More, Cat

more filename or cat filename

View File Contents

Stat

Stat filename

View file status

Tar

TAR–XZVF xxx

Unzip the file
Third, permission operation

Option name

Use formatting

Meaning

chmod

chmod [-R] nnn file or directory

Modify permissions for a file or directory

Chown

chown [ options ] User [   . Group ] file/dir

Modify the owner of a file

Chgrp

Chgrp [-R] Group name Dir/file

Modify the owning group of a file

Iv. Systems and Networks

Option name

Meaning

passwd xxx

Change Password

Df-ah

View disk space

Ps-ef |grep

View process

Kill-9

Kill the process

Vi/etc/profile

modifying environment variables

Vi/etc/sysconfig/network

Vi/etc/hosts

Modify Host Name

Vi/etc/sysconfig/network-scripts/ifcfg-eth0

Modify IP Address

Service Iptables Stop

Chkconfig iptables off

Shutting down the firewall

Setenforce Permissive

Modify/etc/selinux/config

Turn off SELinux

passwd xxx

Change Password

Hadoop diary Day6---common commands for Linux

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