Online inquiries and help command (2)
man help
File and directory operations command (19)
ls cd cp find mkdir mv pwd rename rm rmdir touch tree basename dirname chattr lsattr file md5sum
View documents and content processing command (19)
cat tac more less head tail cut split paste sort uniqo wc iconv dos2unix diff vimdiff rev grep egrep join tr screen vi/vim eval
File compression and decompression command (4)
tar unzip gzip zip
Display command information (12)
uname hostname dmesg uptime file stat du df top free date cal
Search file commands (4)
which find whereis locate
User Management Commands (10)
useradd usermod userdel groupadd groupdel passwd chage id su
visudo sudo
Basic network operation command (10)
telnet ssh scp wget ping route ifconfig ifup ifdown netstat
In-depth network operations command (6)
nmap lsof route mail mutt nslookup dig host traceroute tcpdump
Order the disk and file system (8)
mount umount df du fsck dd dumpe2fs dump fdisk parted mkfs partprobe e2fsck mkswap swapon sync resize2fs
Shutdown commands and view system information (3)
shutdown halt init
Systems management related commands (8)
uptime top free vmstat mpstat iostat sar chkconfig
System security related commands (10)
chmod chown chgrp chage passwd su sudo umask chattr lsattr
View user login information command system (7)
whoami who w last lastlog users finger
Other (19)
echo printf rpm yum watch alias unalias date clear history eject time nohup nc xargs exec export unset type bc
System performance monitoring high-level commands (13)
Memory: top free vmstat mpstat iostat sar
CUP：top vmstat mpstat iostat sar
I/O：vmstat mpstat iostat sar
Process: ipcs ipcrm lsof strace lstrace ps
Load: uptime
Off Power ()
init 0 shutdown
rebot restart