Linux command – ls command

Starting today to introduce you to the common Linux commands, first of all, we introduce the most frequently used command--ls command in Linux.

For more information on Linux commands, see: Linux Command Quick check manual

The Linux ls command is a powerful and useful command for displaying the contents of a specified working directory (which lists the files and subdirectories in the current working directory), as well as viewing the file's permissions (including directories, folders, file permissions), viewing directory information, and so on.

First, ls command syntax

LS [-ALRTAFR] [name ...]

Second, ls command parameters

Here are some common parameters of LS command.

-a displays all files and directories (LS default starts the filename or directory name as ".") As hidden files, will not be listed)-l In addition to the file name, but also the file type, permissions, owner, file size and other information in detail-R to display the file in reverse order (originally in alphabetical order)-T list the file according to the order of establishment time-A and a, but not listed "." (current directory) and ".." (parent directory)-F adds a symbol after the listed file name, for example, the executable file is added "*", the directory is added "/"-R if the directory has files, the following files are also listed in sequence

Three, ls command use example

The following is a few examples to give you a detailed description of the use of the LS command.

List all directories under the root directory (\):

$ls/bin  boot  dev  etc  Home  Lib  lib64  lost+found  media  mnt  opt  Proc  Root  sbin  selinux  SRV  sys  tmp  usr  var

List all files in the current working directory that have the name beginning with B, and the newer the more the following:

$ls-lrt b*backupfile:total 76-rw-r--r--1 root root 23376 Sep  6  date-rw-r--r--1 root root 23376 Sep  6
   2015 20150906144055.tar.gz-rw-r--r--1 root root  1168 Sep  6  backup.log-rw-r--r--1 root root 23376 Se P  6  20150906.tar.gzbaktars:total 18272-rw-r--r--  1 root root  11754834 June  2011 python-2.7.2.tar.bz2-rw-r--r--  1 root root   1407934  2011 sqlite-amalgamation-3.6.20.tar.gz-rw-r--r--  1 root root    253351 Mar  2015 monitorix-3.7.0-1.noarch.rpm-rw-r--r--  1 root root    332005 Jan  8 07:35 setuptools-0.6c11-py2.7.egg-rw-r--r--  1 root root   4563244 Jan  8 15:25 Twisted-15.2.1.tar.bz2drwxr-xr-x  8 root root      4096 Mar  1 15:18 twisted-15.2.1drwxrwxrwx  4 1000 Users     4096 Mar  1 17:49 sqlite-3.6.20drwxr-x---  1002     4096 Mar  1 18:51 python-2.7.2-rw-r--r--  1 root root    370026 Apr 18:25 master.zipdrwxr-xr-x  9 root root      4096 Apr 16 1 8:46 Mod_python-master

List all directories and file details under the Shelltest folder:

$ls-LR shelltest/shelltest/:total 52-rwxr-xr-x 1 root root 1282 May 3 17:41 case2.sh-rwxr-xr-x 1 root root  0 18:59 case3.sh-rwxr-xr-x 1 root root 2   June  2 15:33 date.txt-rwxr-xr-x 1 root root  119 June  16:53 Echo.  Sh-rwxr-xr-x 1 root root  224 June  1 21:11 fun1.sh-rwxr-xr-x 1 root root  197 June  1 21:30 fun2.sh-rwxr-xr-x 1 Root root   June  2 17:55 num1.sh-rwxr-xr-x 1 root root  123 June  2 17:57 num2.sh-rwxr-xr-x 1 root root
   18 June  2 17:06 num.txt-rwxr-xr-x 1 root root  276 may 20:50 select1.sh-rwxr-xr-x 1 root root  20:56 select2.sh-rwxr-xr-x 1 root root  182 may 16:14 test.sh-rwxr-xr-x 1 root root    5 June  2 17:02 who. Txt

Lists the absolute path to all files (including hidden files) in the current directory, without recursion to the directory

#find $PWD-maxdepth 1 | Xargs ls-lddrwxr-xr-x  5 root root 4096 may 20:48/root/testdrwxr-xr-x root root 4096 Feb 09:24/ROOT/TEST/CP Ptestdrwxr-xr-x  2 root root 4096 21:21/root/test/lntstdrwxr-xr-x  2 root root 4096 June  2 17:57/root/te st/shelltest-rw-r--r--  2 root root    0 Dec 21:30/root/test/linuxdaxue.com

List all the files and directories under the current working directory; add "/" to the name, and the file name to add "*"

#ls-afcpptest/  lntst/  shelltest/  linuxdaxue.com

Well, for the introduction of the Linux LS command, let's talk about here, more Linux command details, see: Linux Command Quick check manual

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Linux command – ls command