| c |
| cat | View the contents of a file |
| cd | Move the directory |
| chgrp | Change the group to which files and directories belong. |
chkconfig
| Control service registration, deletion, and service startup. |
| chmod | Change permissions on files and directories |
| chown | Change the owner of a file or directory |
| cp | Copying files and directories |
| d |
| date | View, set, and change the current date and time. |
| df | Aggregate and display the size of free disk space. |
dmesg
| Display system messages at startup |
| dstat | Real-time monitoring of server resources |
| du | Check and display usage by directory. |
| f |
| free | Checking the memory status of Linux |
| g |
| groupadd | Add a group |
| i |
ifconfg
| Check the operation status of the network interface. |
| l |
| last | Display the history of logins to the system. |
logout
| Logging out |
| ls | Display a list of files in a directory |
| m |
| mkdir | Create a directory |
| mv | Move or rename a file |
| n |
| netstat | Display the current network information |
ntpdate
| Set the server time. |
| p |
| passwd | Change your password |
| ping | Check for communication with hosts on the network. |
| ps | View and check the status of processes in a list |
| pstree | Display the process in a tree view |
| pwd | Display the current directory |
| r |
| rm | Delete a file or directory |
rpm
| Managing RPM package |
| s |
| sed | Convert characters |
| shutdown | Shut down and reboot the system. |
source
| Reflect the shell configuration file. |
| su | Switch to another user |
| t |
| tail | Display the contents of a file only at the end. |
| tar | Create/Restore Archives |
| tcpdump | Capture packets |
| top | View running processes in real time. |
| u |
| useradd | Add a user |
| v |
| vmstat | Display the load rate and usage status of memory and CPU. |
| w |
| w | Show user information while logged in |
wget
| Download files by specifying URL |
| who | Find out which users are logged in. |
