Linux-cento OS Learning Note 1

1. When logging into the Linux system, the command line interface,

[[email protected] Desktop] #

Name of the directory where the user name hostname is located

There are two characters:

#: Indicates the current user entered the root user

When configuring the system, you need to use the root user

$: Indicates that the user belongs to a normal user

2. Under Linux, view the command for the IP address

# ifconfig

Similar to the ipconfig of Windows systems

3.linux basic Commands

Clean up the screen # clear

Create User # Useradd XXXX

Under the Linux system, by default, creating a user will create a user's own directory under the system directory called the user's home directory.

Typically, the Home/username user home directory can use the ~ representation

Set Password #passwd XXXXX

The above xxxxx is the user name created

Switch User #|$ su-xxxxxxxx

Note: 1.root user switch to normal user does not need to enter a password

2. Switch from normal user to root user needs to enter a password

Displays the directory where the current user is located #|$ pwd

Host name of Linux system

* View Host Name

#|$ hostname

* Set host Name

# hostname XXXXXXXX

Note: This way to set the host name, only in the current use of no problem, when the machine restarts, the host name will change

The reason for this is that the system configuration information from the Linux system is in the file

* Permanently set host name

Cento OS 6: Modifying the relevant configuration file

Cento os 7:hostnamectl set-hostname XXXXXXXX

Commands to read the contents of a file on a Linux system

Cat

Linux Editing Tools VI

#vi filename--Edit file contents

Enter edit Insert mode press the I key

Exit Insert mode Press the ESC key

Save File

First step: colon (:)

Step Two: Wq

Do not save the file

First step: colon (:)

Step Two: q!

Rebooting the system

* Turn off the machine

# Halt

* Restart

# reboot

#init 6

Remote Connection Tool

Assist us to use the system for easy operation

Four Remote connection Tools

Remote Connection 4 Features

*ip Address

* User Name

* Password

* Protocol SSH

* Remote command line

SECURECRT Remote command line

Note: When you first remotely connect to a Linux system, go to the current user's home directory

Remote FTP

File Transfer protocal

FileZilla

Remote editing tools

notepad++

UltraEdit

Remote interface Tools

Xmanage4

Mapping of host names to IP addresses

Host Name: Example xxxxxxxx

IP Address: Example 192.xxx.xxx.xxx

Configuration file

Linux system under the/etc/hosts

Win7 System in C:\windows\System32\drivers\etc\hosts

Add the following in the host file: IP address host name

Basic commands

See which files are in the current directory

LS--list

Ls-l View more information

ll last a short view of the detailed information

Ls-a Show all directories, more than LS. The. begin with the. files that begin with the. Hide file

Special Directory Identifiers

A point. : Represents the current directory

Two points: Represents the parent directory

To switch directories:

CD DirName

CD is a shorthand for change directory

Create a file

Touch xxx.xxx

such as Readme.txt

　　

Linux-cento OS Learning Note 1