Linux common basic commands
ls command
ls view files in the current directory
- -l In addition to the document name, the document type, permission, owner, document size and other information are also listed in detail
- -a displays all files, including hidden files (beginning with a dot)
- -h easy human reading way
cd command
cd switch path
cat、more、less、tail、watch命令
The command used
by cat to display files is read page by page.
Less and more are almost the same.
Tail can be used to view the contents of files.
Watch provides a way to handle repetitive tasks. By default, watch will execute commands repeatedly every 2 seconds.
Tail and watch cooperate: watch -n 2 tail -20
cp and rm commands
rm delete file
cp copy and paste
- -r If the source file given is a directory file, all subdirectories and files in the directory will be copied at this time.
top and ps commands
top monitors linux performance (a bit like window task manager)
- k kill process
- q exit
ps process information
- -ef details are similar to aux
grep command
grep is used to find qualified strings in the file
chmod command
chmod permissions
netstat command
netstat is used to display network status
- netstat -pantu this machine and which servers have connections
ifconfig command
ifconfig view ip
- ifconfig xxx down turn off xxx
- ifconfig xxx up open
mount command
mount is used to mount directories
dmesg command
dmesg is used to display boot information
find command
find find things
tar command
The tar command is used to backup files
man command
man help manual
whereis command
whereis find things
- -b binary executable file
echo command
echo shows some information
- -n do not wrap output
vi instruction
- ：Set nu plus a serial number
- ：Wq save the result content
- i can edit
- esc exit editing
- dd delete a line
- o Insert a line of editing under the cursor
- v Copy
- p paste
Pipe character
- |The output of the previous command, as the next command parameter
- || Indicates that the next command is executed after the previous command fails
- & Indicates that the task is executed in the background
- && means that the next command will be executed when the previous command is executed successfully
Linux command complete: https://www.runoob.com/linux/linux-command-manual.html