Linux Common commands

From: http://www.linuxidc.com/Linux/2011-08/40437.htm

Linux commands for managing files and directories

Command	Function	Command	Function
Pwd	Show current directory	Ls	View the contents of the directory
Cd	Change your directory	Cat	Display the contents of a file
Grep	Find a character in a file	Cp	Copying files
Touch	Create a file	Mv	Moving files
Rm	deleting files	RmDir	Delete Directory

1.1 pwd Command

The command is interpreted in English as print working directory (print working directory). Enter the PWD command, and Linux will output the current directory.

1.2 CD command

The CD command is used to change your directory.

CD/go to the root directory
CD ~ Go to the/home/user user directory
Cd/usr go to the USR directory in the root directory-------------absolute path
CD test goes to-------relative path in the test subdirectory under the current directory

1.3 ls Command

The LS command is used to view the contents of the directory.

Options	Meaning
-A	Enumerate all the files in the directory, including hidden files
-L	List details in the directory, including permissions, owner, group, size, date created, whether the file is a link, etc.
-F	List of files showing file types
-R	Reverse, from the back to list the contents of the directory
-R	Recursive, this option recursively enumerates the contents of all subdirectories in the current directory
-S	Size, sorted by file size
-H	Display the size of a file in a human-readable way, such as K, M, G units
Ls-l Examples.doc	List all information about file Examples.doc

1.4 Cat Command

The cat command can be used to merge files or to display the contents of the entire file on the screen.

Cat Snow.txt The command displays the contents of the file Snow.txt, Ctrl+d quits Cat.

1.5 grep command

The most important function of the grep command is to find a specific string in a heap of files.

grep Money Test.txt

The above command looks for the money string in Test.txt, and the grep lookup is case-sensitive.

1.6 Touch Command

The touch command is used to create a new file, and he can create a blank file where you can add text and data.

Touch newfile This command to create a blank file named NewFile.

1.7 cp Command

The CP command is used to copy files, to copy files, and to enter commands:

CP <source filename> <target filename>

CP t.txt document/t The command will copy the file T.txt to the document directory and be named T.

Options	Meaning
-I.	Interactive: If the file will overwrite the target file, he will be prompted to confirm
-R	Recursion: This option copies the entire directory tree, subdirectories, and other
-V	Verbose: Show the progress of a file's replication

1.8 MV Command

The MV command is used to move files.

Options	Description
-I.	Interaction: If the selected file overwrites the file in the target, he will prompt to confirm
-F	Mandatory: It will go beyond interactive mode and move files without prompting, which is a very dangerous option
-V	Verbose: Show the progress of a file's movement

MV T.txt document moves the file T.txt to the directory document.

1.9 RM Command

The RM command is used to delete files.

Options	Description
-I.	Interactive: Prompt to confirm deletion
-F	Force: Replace interactive mode without prompting to confirm deletion
-V	Verbose: Show file deletion progress
-R	Recursive: Deletes a directory and all of its files and subdirectories

RM t.txt the command to delete the file T.txt

1.10 rmdir Command

The rmdir command is used to delete a directory.

Linux common commands (GO)