1) ls view the contents of the current folder
2) pwd view the current path
3) Clear screen
4) mkdir create folder
5) touch create file
6) rm delete file rm -r delete folder
7) cp copy
8) mv move, rename
9)> Redirect
10) more split screen display
11) | Pipe the output of one command can be used as the input of another command through the pipeline
12) cat view or merge file content
13) tree displays the contents of the folder in the shape of a tree
14) ln hard link ln -s soft link
15) tar is packed into compressed files
16) Unzip gzip
17) find search file
18) grep search file content
19) Zipped file
20) Unzip with uzip
21) chmod file permissions rwx read and write execution
22) Who view logged in users
23) ifconfig View or configure network card information
24) Ping test whether the network is safe