ls file added

_commands/basics/ls.md

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+---
+---
+
+ls
+-------
+
+`ls`  ls command lists the contents of, and optional information about, directories and files. 
+With no options, ls lists the files contained in the current directory, sorting them
+alphabetically.
+
+~~~ bash
+$ ls [option ...] [file]...
+ls [option ...] [file]...
+~~~
+
+ <!--more-->
+
+### Useful Options / Examples
+
+### `ls -a`
+
+Shows the hidden files in the directory as well.
+
+~~~ bash
+ $ ls -a
+ a.txt b.txt c.txt
+~~~
+
+### `ls -l`
+
+ Shows file or directory, size, modified date and time,  
+ file or folder name and owner of file and its permission.
+
+~~~ bash
+ $ ls - l
+ $ -rw-r--r--. 1 <directory>   683 Aug 19 09:59 a.txt
+ $ -rw-------. 1 <directory>   1586 Jul 31 02:17 b.txt
+~~~