S1-Nguyen Viet Hai

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Package & Software

Install Package

$ sudo apt-get install <package_name>

Remove Package

$ sudo apt-get remove <package_name>

Update the Package

$ sudo apt-get update

User & Group

Create user

$ sudo useradd <user>

Set password

$ sudo passwd <user>

Delete user

$ sudo userdel <user>

Create group

$ sudo groupadd <groupname>

Add user into group

$ sudo usermod -a -G <groupname> <username>

Delete group

$ sudo groupdel <groupname> 

The | symbol

The result in the left is the param for the right

$ history | grep l

System

Listing proccess

$ ps

Help

Show command manual

$ man <command>

$ man cat

FILE AND DIRECTORY

Listing file and directory

$ ls <option> <directory>

• -l listing with peropety: owner, permission, time, size ...
• -a include hidden file and hidden directory

Get current directory

$ pwd

Go to directory

$ cd <directory>

Show file content

$ cat <filename>

copy file

$ cp

Move file or rename file

$ mv 

Make directory

$ mkdir

Remove file

$ rm 
# sudo rm -rf /*

Create file

$ touch <filename>

Show the tail file

$ tail
$ tail -f #show and keep the output, it is useful to check file change realtime
$ tail -n 10 # show the last 10 lines

Open file in nano editor

$ nano
$ nano README.md

Open file in Vim editor

$ vim
$ vim README.md

OWER, PERMISSION

Login to root user

$ sudo su

Set file permission

$ chmod <option> <specification> file
# chmod -R 777 storage
# chmod 644 index.php

Set owner for file

$ chown <option> <user>:<group> file

Search

Find string in file

$ grep <word> <filename>
# grep vagrant Vagrantfile

Network

Show network information

$ ifconfig

Show information and statistics about protocols

netstat

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@at-hainguyen5

• Cấu trúc tốt, rành mạch, rõ ràng
• Còn thiếu các lệnh về user, group, cài đặt phần mềm,...