## | | | | alias cls=clear | |—-|——–|————————————————————————————————————-|————————————————————-| | 1 | alias | | | | 2 | cat | | | | 3 | cd | | | | 4 | chmod | | | | 5 | chown | change the owner and group owner of a file | sudo chown dave:mary example.txt | | 6 | curl | a tool to retrieve information and files from URLs or internet addresses | | | 7 | df | shows the size, used space, and available space on the mounted filesystems of your computer | df -h -x squashfs -h (human readable);-x (exclude) | | 8 | diff | compares two text files and shows the differences between them | diff -y -W 70 alpha1.txt alpha2.txt –suppress-common-lines | | 9 | echo | prints (echoes) a string of text to the terminal window | echo $USER can show the value of environment variables | | 10 | exit | close a terminal window, end the execution of a shell script, log you out of an SSH remote access session. | | | 11 | find | | | | 12 | finger | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |

参考文献
https://www.howtogeek.com/412055/37-important-linux-commands-you-should-know/