Linux commands (2) LS

1. command format

ls [OPTION] ... [FILE] ...

2. Command function

List all subdirectories and files in the destination directory

3. Command Parameters

- A lists all files under the directory, including the. the implied file at the beginning.

-B lists the characters that are not output in the file name in the form of a backslash and a character number (as in the C language ) .

-C The modified time of the I node of the output file and sorted by this.

-D Displays the directory as if it were a file, rather than displaying the file below it.

-e Outputs the full information of the time, not the output of the brief information.

-f-u the output file is not sorted.

-G useless.

-I index information for the I node of the output file .

- k represents the size of a file in the form of a byte.

-L lists the file details.

-m output file name horizontally and "," as a separator.

-N replaces the name with the uid,gid of the number .

-O displays detailed information about the file in addition to the group information.

-p-f a character after each file name to indicate the type of the file,"*" means an executable plain file;"/" means a directory;"@" denotes a symbolic link;"|" represents FIFOs;"=" means socket (sockets).

Q- use ? instead of characters that cannot be exported.

-R sorts the directory backwards.

-S prints the size of the file after each file name.

-T is sorted by time.

-U Sorts the time the file was last accessed.

-X output by column, sorted horizontally.

-a displays except for "." and ".." all files outside the file.

-B does not output backup files ending with "~".

-C output by column, sorted vertically.

-G output file for the group information.

-L lists the link file name instead of the file that is linked to.

-n does not limit file length.

-Q Enclose the file name of the output in double quotation marks.

-R Lists all the files under subdirectories.

-S is sorted by file size.

-X to the file's extension (the last one .) after the character ) sort.

-1 rows only output one file.

--color=no do not display color file names

The--HELP displays help information on the standard output.

the--version outputs the version information on the standard output and exits.

4. Command Instances

Example 1: no parameter query

[[email protected] ~]# ls

Anaconda-ks.cfg Install.log Install.log.syslog

Example 2: Show whether it is a file or a directory, its size, date and time of modification, the name of the file or directory, and the owner of the file and its permissions

[Email protected]/]# ls-l

Total 90

Dr-xr-xr-x. 2 root root 4096 Jul 19:24 bin

Dr-xr-xr-x. 5 root root 8 19:19 boot

Drwxr-xr-x. Root root 3700 Jul 03:46 Dev

Drwxr-xr-x. 03:46 root root 4096 Jul etc

Drwxr-xr-x. 2 root root 4096 Sep Home

Dr-xr-xr-x. Root root 4096 Jul 19:24 Lib

Dr-xr-xr-x. 9 root root 12288 Jul 19:24 lib64

DRWX------. 2 root root 16384 Jul 8 19:10lost+found

Drwxr-xr-x. 2 root root 4096 Sep media

Drwxr-xr-x. 2 root root 4096 Sep mnt

Drwxr-xr-x. 3 root root 4096 Jul 8 19:16 opt

Dr-xr-xr-x. 03:46 root root 0 Jul proc

Dr-xr-x---. 2 root root 4096 Jul 04:51root

Dr-xr-xr-x. 2 root root 12288 Jul 19:24 sbin

Drwxr-xr-x. 7 root root 0 Jul 03:46selinux

Drwxr-xr-x. 2 root root 4096 Sep (SRV)

Drwxr-xr-x. Root root 0Jul 03:46 sys

DRWXRWXRWT. 3 root root 4096 Jul 04:24 tmp

Drwxr-xr-x. Root root 4096 Jul 8 19:12 usr

Drwxr-xr-x. Root root 4096 Jul 8 19:16 var

Example 3: List all files including the '. ' the hidden file at the beginning.

[Email protected]/]# ls-a

. . autofsck Boot etc lib lost+found mnt proc sbin SRV tmp var

.. Bin Dev Home lib64 media opt root selinux sys usr

Example 4 : The file is serialized out.

[Email protected]/]# Ls-r

var tmp srv sbin proc mnt lost+found lib etc boot

USR sys selinux Root opt media lib64 home Dev Bin

[[email protected]/]# ls

Bin Dev Home lib64 media opt root selinux sys usr

Boot etc lib Lost+found mnt proc sbin SRV tmp var

Example 5: Display them in the order of the most recent modification time of the file or directory.

[Email protected]/]# ls-ltr

Total 90

Drwxr-xr-x. 2 root root 4096 Sep (SRV)

Drwxr-xr-x. 2 root root 4096 Sep mnt

Drwxr-xr-x. 2 root root 4096 Sep media

Drwxr-xr-x. 2 root root 4096 Sep Home

DRWX------. 2 root root 16384 Jul 8 19:10lost+found

Drwxr-xr-x. Root root 4096 Jul 8 19:12 usr

Drwxr-xr-x. Root root 4096 Jul 8 19:16 var

Drwxr-xr-x. 3 root root 4096 Jul 8 19:16 opt

Dr-xr-xr-x. 5 root root 8 19:19 boot

Dr-xr-xr-x. Root root 4096 Jul 19:24 Lib

Dr-xr-xr-x. 9 root root 12288 Jul 19:24 lib64

Dr-xr-xr-x. 2 root root 4096 Jul 19:24 bin

Dr-xr-xr-x. 2 root root 12288 Jul 19:24 sbin

Dr-xr-xr-x. 03:46 root root 0 Jul proc

Drwxr-xr-x. Root root 0 Jul 03:46 sys

Drwxr-xr-x. 7 root root 0 Jul 03:46selinux

Drwxr-xr-x. 03:46 root root 4096 Jul etc

Drwxr-xr-x. Root root 3700 Jul 03:46 Dev

DRWXRWXRWT. 3 root root 4096 Jul 04:24 tmp

Dr-xr-x---. 2 root root 4096 Jul 04:51root

Reference:http://os.51cto.com/art/201503/469602.htm

Linux commands (2) LS