Usage: cd [directory path]
Change the working directory to the specified directory path, if the [Directory Path] parameter is omitted, it will be changed to the user's home directory, where [Directory Path] can be an absolute path or a relative path
In addition, "~" indicates the current user's home directory in Bash, "." indicates the current directory, ".." indicates the upper level of the current directory, and "-" indicates the directory before the jump.
Example :
Jump to /usr/bin/ : cd /usr/bin
Go back to the previous directory: cd -
Jump two levels above the current directory: cd ../..
Usage: mkdir [options]... directory...
Creates the directory if the specified directory does not exist.
-m, --mode=mode set permission mode (similar to chmod command)
-p creates directories above the target directory if needed, but does not treat as an error even if these directories already exist
Usage: rmdir[options]... directory...
Creates the directory if the specified directory does not exist.
-m, --mode=mode set permission mode (similar to chmod command)
-p creates directories above the target directory if needed, but does not treat as an error even if these directories already exist