Happy Linux command line

LS-List Directory contents

-A list of all files -d Specifies directory information -F for directory additions/ identifiers -H Enhanced readability -L column mode display -R reverse order display -S Sort by size -T by modified time

File-Determine the type of files

Less-Browse file contents

Manipulating Files and directories

CP Copy files/directories

-a copy of files, directories, and their properties -I need to prompt if overwrite occurs -R recursively copies the contents of the file, which is used when copying the directory -youonly copy files that do not exist in the target directory -V display of detailed command operation information

MV Move/rename files/directories

-I prompt user before overwriting an already existing file -u move only nonexistent file, or file content new file -V display detailed operation information

mkdir Creating a Directory

RM Delete files/directories

-I delete before prompt -r Recursive delete file, generally delete directory when used -f Ignore nonexistent file -V display detailed operation information

Note: Execute the LS before executing RM and see which files are deleted

LN creates a hard link or symbolic link

Symbolic Link:lnfile link hard link:ln -S item link, item can be a file or a directory

Hard Links:

By default, each file has a hard link.

A hard link cannot associate a file other than the file system in which it resides.

Hard links cannot be associated with a directory

Symbolic Links:

Equivalent to a shortcut in Windows

Type description Command types

The four-form of the command: an alias for the executable inside the shell's own command shell function command [email protected]-rev-1-0: ~$ TypelslsIs 'ls--color=auto'the alias[Email protected]1-0:~$ type showrtshowrt is 'SH/home/sherry/workplace/usefull/SH/showtime.SH'the alias[Email protected]1-0:~$ type CDCD is shell built-in [email protected]-rev-1-0: ~$ type Start-all.SHStart-all.SHIt's/opt/hadoop-.1.2.1/bin/start-all.SH

Which shows the program executed by the command

[Email protected] 1-0whichman/usr/bin/Mans

Man Query Command manual

Apropops displays a series of appropriate commands

Info Display command Information

Whatis A concise description of the display command

Alias create command Alias

Happy Linux command line