Linux Basics Common Linux commands

Common Linux commands: CD, CP, LS, MV, RM

CD command : Switch the current working directory to dirName (directory parameter)

Where dirName can be either an absolute path or a relative path. If the directory name is omitted, it is transformed to the user's home directory (that is, the directory where login was first).

In addition, "~" is also indicated as the home directory meaning, "." is the current directory, "." Represents the current directory location of the previous level of the directory.

CD [DirName]

Parameters:

• DirName: The target directory to switch to.

Instance:

Jump to/usr/bin/:

Cd/usr/bin

Jump to your home directory:

CD ~

Jump to the top two of the current directory:

Cd.. /..

CP command : Copy files or directories

CP [Options] Source Dest

Parameter description:

• -A: This option is typically used when replicating a directory, preserving links, file attributes, and copying everything under the directory. Its function equals the DPR parameter combination.
• -D: Keep the link when copying. The link here is equivalent to a shortcut in a Windows system.
• -F: Overwrite the existing target file without prompting.
• -I: In contrast to the-f option, a prompt is given before overwriting the target file, asking the user to confirm whether to overwrite, and the target file will be overwritten when the "Y" is answered.
• -P: In addition to copying the contents of the file, the modification time and access rights are also copied to the new file.
• -R: If the given source file is a directory file, all subdirectories and files under that directory will be copied.
• -L: Do not copy files, just generate linked files

Instance:

Using the instruction "CP" to copy all files under current directory "test/" to the new directory "Newtest", enter the following command:

Cp–r Test/newtest

ls command : Lists the files and subdirectories contained in the current working directory

LS [-ALRTAFR] [name]

Parameters:

• -a displays all files and directories (LS default starts the filename or directory name as ".") As hidden files, not listed)
• -L In addition to the file name, also the file type, permissions, owner, file size and other information detailed list
• -r Displays the file in reverse order (originally alphabetical order)
• -T lists the files in the order of establishment time
• -A with-a, but not listed "." (current directory) and ".." (Parent directory)
• -F adds a symbol after the listed file name, for example, the executable file adds "*" and the Directory adds "/".
• -R If there are documents under the catalogue, the following documents are also listed

Instance:

List all directories under the root directory (/):

LS/

List all directories and file details below the/bin directory:

Ls-lr/bin

mkdir Command : Create a folder

mkdir [-P] DirName

Parameter description:

• -p Ensure that the directory name exists and that it does not exist.

Instance:

Under working directory, create a subdirectory named Taotao:

mkdir Taotao

In the Taotao directory under the working directory, create a subdirectory named data. If the Taotao directory does not already exist, create one. (Note: If this example does not add-p and the original Taotao directory does not exist, an error is generated.) ）

Mkdir-p Taotao/data

MV Command : Used to rename a file or directory, or to move a file or directory into another location

MV [options] source DESTMV [options] Source directory

Parameter description:

• -I: If the specified directory already has the same name file, first ask whether to overwrite the old file;
• -F: Do not give any indication when the MV operation is to overwrite an existing target file;

MV parameter setting and running result

Command format	Run results
MV FileName File name	Change source file to target file name
MV FileName Directory Name	To move a file to the destination directory
MV Directory name Directory name	The destination directory already exists and the source directory is moved to the target directory; Rename if destination directory does not exist
MV Directory name File name	Error

Instance:

Rename the file Taotao.txt to Wulitaotao.txt:

MV Taotao.txt Wulitaotao.txt

Put the info directory in the logs directory. Note that if the logs directory does not exist, the command renames info to logs.

MV Info/logs

If you move all files and directories under/usr/student to the current directory, the command behavior:

mv/usr/student/*  .

RM Command : Delete a file or directory

RM [Options] Name

Parameters:

• -I ask for confirmation before deleting.
• -F Even if the original file attribute is set to read-only, it is deleted directly without confirmation.
• -R the directory and the following files are also deleted.

Instance:

Delete files can be directly using the RM command, if you delete the directory you must match the option "-r", for example:

# RM   " Test.txt "? y   # RM  Homework  RM: Unable to delete directory "homework": is a  directory # RM  -  R  Homework"homework"

Delete all files and directories under the current directory, command behavior:

RM-  R  

References

Beginner's Tutorial: Linux commands Daquan

Linux Basics Common Linux commands