ls Command: List Contents of Directory

Summary
The ls command list all files in a directory. This command is used often when navigating through your file system through the terminal.

SYNOPSIS
ls [OPTION] [FILE]

When you invoke the command with no arguments, the files in the current directory is listed.

Options
Given here are common options used often. You can combine options together.

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-a    List all entries. For example, files that begin with a period (.) are listed.   -l    List in long format.       1st column: File Type and file permissions for users, group, and others.       2nd column: Number of links       3rd column: File owner       4th column: Group owner       5th column: File size       6th column: Last modification date       7th column: Name of file       Example: -rw-rw-r--  1  oracle  oracle  6880  Oct 21 23:10  README   -h   Print file sizes in human readable format (e.g. 8.3M, 1.1K, etc)   -R   Recursively list sub-directories encountered.   -F   Appends a character  revealing the nature of a file.       Regular files have no suffix.       *   executable file       @  symbolic link       /   directory       =  sockets   -t   Sort by time modified. Latest first.   -i   Print the i-number   -u   Use time of last access instead of last modification.   -1   Force one-entry-per-line output format.