150 commands that Linux must master

Online Enquiry and Help commands (1)
Mans
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

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

The above command belongs to the martial arts "Nine yin Canon", if mastered well, will be very cow.

Shutdown/restart/logoff commands

Turn off the machine:
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
Cancellation
Logout
Exit (common production)
Ctl+d--> shortcut keys (production is used)

Process Management: (16)
BG: Running in the background FG: Suspend program jobs: Show daemon Kill,killall,pkill: Kill 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

150 commands that Linux must master