[Command tips] ls

Address: http://www.dutor.net/index.php/2010/06/cmd-ls/

[Command tips] ls

Ls = List: lists information about a specified directory or file based on different options. It is one of the most common commands in Unix/Linux, CD to a directory and then run the first command.

Ls

Ls without parameters lists the files and directories in the current directory, ls folder lists the files and subdirectories in the folder, and LS file displays the file information (the default is the file name ).

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Dutor @ Dutor-desktop :~ $ CD Wdir/ / Home / Dutor / Wdirdutor @ Dutor-desktop :~ / Wdir $ Ls Apue asm cpp latex PHP Python QT shelldutor @ Dutor-desktop :~ / Wdir $ Ls CPP/ ACM main. cpp makefile pthread symtab tags test. scurses main. C main. s playaround STL systemprogram test. c tutmanualdutor @ Dutor-desktop :~ / Wdir $ Ls CPP / Makefilecpp / Makefile

Ls-

-Option A is the same as LS, But it lists all the files in the current directory or specified directory, including the files starting with dot (.),. directory, and. directory.

12	Dutor@Dutor-desktop :~/Wdir $Ls -... Apue asm cpp. I2C. C. SWP latex PHP Python QT Shell

Ls-

-Option A is the same as LS, but lists all files in the current directory or specified directory, including files starting with dot (.), but not the. Directory and. directory.

12	Dutor@Dutor-desktop :~/Wdir $Ls -Apue asm cpp. I2C. C. SWP latex PHP Python QT Shell

Ls-l

The-L option LS command lists the detailed analysis information of files or subdirectories in the current directory or specified directory.

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Dutor @ Dutor-desktop :~ / Wdir / CPP / STL $ Ls -L Total 32 Drwxr-XR-x 2 Dutor 4096 2010 -04- 19 19 : 25 Bind2nd -RW-r -- 1 Dutor 1296 2010 -03- 27 18 : 39 Heap. cpp-RW-r -- 1 Dutor 980 2010 -03- 27 18 : 03 Kth-Max.cpp -RW-r -- 1 Dutor 1168 2010 -04- 29 20 : 24 Main. cpp -RW-r -- 1 Dutor 709 2010 -04- 20 17 : 58 Operator. cpp -RW-r -- 1 Dutor 654 2010 -03- 27 17 : 40 Priority_queue.cpp -RW-r -- 1 Dutor461 2010 -04- 10 22 : 41 Sort_list.cpp -RW-r -- 1 Dutor 655 2010 -04- 29 21 : 18 Test. cpp

The LS-l information contains seven tabs:

• First field: the first character specifies the file type
  • -: Common File;
  • D: directory file;
  • L: Symbolic Link;
  • S: Socket file;
  • B: Block devices;
  • C: character device;
  • P: MPS queue file.

  The following nine characters indicate the object access permissions. Each three characters indicate the permissions of a class of users, including the file owner, users in the same group, and other users. The permissions are divided into read (R), write (W), execute (X ).

• Second domain: number of links. The normal file must be at least 1, and the directory must be at least 2 (... and ..);
• Third domain: file owner;
• Domain 4: User Group;
• Field 5: file size. The directory size is usually an integer multiple of the block size;
• Sixth domain: the last modification date and time of the file. Modifying the file means adding and modifying the files or subdirectories in the file;
• Domain 7: File Name

Ls-T

List objects based on the file modification time. The last modification is before.

1234	Dutor@Dutor-desktop :~/Wdir $LsApue asm cpp latex PHP Python QT shelldutor@Dutor-desktop :~/Wdir $Ls -TCpp qt shell php asm latex apue Python

Ls-R

List objects in reverse order.

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Dutor@Dutor-desktop :~/Wdir $LsApue asm cpp latex PHP Python QT shelldutor@Dutor-desktop :~/Wdir $Ls -TCpp qt shell php asm latex apue pythondutor@Dutor-desktop :~/Wdir $Ls -TrPython apue latex asm php shell QT CPP

Ls-1

List objects in a single row.

Ls-F

Visual display file type.

12	$ ls -F desktop / events / Ubuntu-app @ firstfile music / Public / templates /

• /: Directory
• Nothing: common file.
• @: Symbolic Link file
• *: Executable File

Ls-latr

That is to say, each option can be used in combination, except for mutually exclusive options, such as-a and-.

Use alias

It is more convenient to use alias. the alias defined by me include:

123	Alias Ll='LS-lH'Alias La='LS-'Alias L='LS-CF'

End