Comprehensive Guide to Using the ls Command in Linux

ls is a fundamental Linux command for listing directory contents. By default it shows names of files and directories in the current directory.

Common options include:

$ ls – basic listing without details.

$ ls -l – long format showing permissions, links, owner, group, size, modification time, and name.

$ ls -lh – human‑readable sizes.

$ ls -a – include hidden entries (those starting with a dot).

$ ls -lhS – sort by size, largest first, with human‑readable units.

$ ls -li – display inode numbers.

$ ls -p – append ‘/’ to directories.

$ ls -r – reverse order.

$ ls -R – recursive listing of subdirectories.

$ ls -lX – sort by file extension.

$ ls -lt – sort by modification time, newest first.

$ ls -d */ – list only directories.

$ ls -g – omit owner information.

$ ls -lG – omit group information.

$ ls --color=never – disable colored output.

$ ls -si – size in 1000‑byte units.

$ ls --block-size=M – display sizes in megabytes.

$ ls ~ – show the home directory.

$ ls ../ – list the parent directory.

$ ls --version – print ls version.

The article also explains how to interpret the columns of the long listing, the meaning of permission bits, and how to combine options for more powerful queries.