The thing about Linux

Table of Contents Operations Commands (6)

ls tree pwd mkdir rmdir CD

File Operations Command (7)

Touch CP MV RM Ln Find rename

File View and Processing commands (21)

Cat more less head TAC Head tail cut paste

Sort uniq WC iconv Dos2unix file diff tree Chattr

Lsattr Rev Vimdiff

File Pack and Compress command (3)

Gzip Tar Unzip

Information display commands (12)

uname hostname dmesg uptime file stat du DF top free W Date

Search Files Command (4)

Find which Whereis locate

Search text Commands (2)

grep egrep

User Management commands (10)

Useradd Userdel passwd chage usermod id su sudo visudo

Groupadd

Basic Network Operations Commands (10)

Telnet ssh scp wget ping route ifconfig ifup Ifdown Netstat

Deep Network Operations Command (6)

Route mail Mutt nslookup dig wget

Commands for disk space (6)

Mount Umount DF du fsck DD

Commands for shutting down and viewing system information (7)

Shutdown reboot PS Top Kill date

Install and Login commands (3)

Shutdown halt reboot

System Management Related commands (9)

Top free Vmstat mpstat iostat SAR kill Chkconfig Last

System security-related commands (13)

passwd su sudo umask chgrp chmod chown chattr lsattr PS

WhoAmI

View System User Login Information command (6)

W who's users last Lastlog fingers

View hardware-related commands (6)

Ethtool Mii-tool Dmidecode DMESG Lspci

Other (14)

Chkconfig Echo Yum Watch alias Unalias date Clear History Eject time Nohup NC xargs

Advanced Linux commands for monitoring physical components

Memory: Top free vmstat mpstat iostat SAR

Cpu:top Vmstat Mpstat Iostat SAR

I/o:vmstat Mpstat Iostat SAR

Process: IPCS IPCRM

Load: Uptime

Shutdown/restart/logoff commands

Shutdown:

Shutdown-h now――> immediately shut down (production commonly used)

Shhutdown-h +1――>1 minutes after the shutdown

Init 0

Halt――> immediately stop the system and require manual power-down

Halt-p

Poweroff――> Stop the system immediately and power off

Restart :

Reboot (common production)

Shutdown-r now (production used)

Shhutdown-r +1――>1 minutes after the restart

Init 6

Log off

Logout

Exit (common production)

Ctl+d――> shortcut keys (production is used)

Process Management: (16)

BG: Running in the background FG: Suspend program jobs: Show Background programs

Kill,killall,pkill: Kill the process

Crontab: Set Timing PS: View process pstree: Show process status tree

Top: Show process nice: Change priority nohup: Continue working after the user exits the system

Pgrep: Finding matching Criteria for a process STRACE: Tracking system calls for a process

LTRACE: Tracking process Call library function Vmstat: Reporting virtual memory statistics

Dangerous system Commands:

MV RM DD Fdisk parted

Linux Four swordsman (4)

grep egrep sed awk

What's happening with Linux