Generally speaking, you don't need to learn all the commands completely, but you are generally impressed. Please check the help documents when you use them. Over time, you will become naturally skilled.
The following are the 20 most commonly used Linux commands compiled by netizens:
1.ls command
The ls command means to list the contents of the directory. It is run to list the contents of folders, which may be files or folders.
2.lsblk command
"lsblk" is a device that lists blocks. Except for RAM, block devices are displayed neatly in a standard tree output format.
3.md5sum command
"md5sum" is the signature for calculating and verifying MD5 information. Md5 checksum (commonly known as hash) is used to match or verify the integrity of files, because files may be changed due to transmission errors, disk errors or harmless interference.
4.dd command
The "dd" command means converting and copying files. It can be used to convert and copy files, and most of the time it is used to copy iso files (or any other files) to usb devices (or anywhere else), so it can be used as a USB launcher.
6. Historical orders
The "history" command is history. It shows the history of all commands executed in the terminal.
7.sudo command
The "sudo" (super user do) command allows authorized users to execute the commands of super users or other users. It is specified by the security policy in the sudoers list.
8.mkdir command
The "mkdir" (make directory) command creates a new directory under the specified path. However, if the directory already exists, an error message "Cannot create folder, folder already exists" will be returned ("Cannot create folder, folder already exists").
9. Touch command
The "Touch" command indicates that the file access and modification time is updated to the current time. The touch command only creates files when they don't exist. If the file already exists, it will update the timestamp, but it will not change the contents of the file.
10.chmod command
The "chmod" command is used to change the mode bit of a file. Chmod will change the file mode (permissions) of each given file, folder, script, etc. According to the required mode.