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Basic Commands in Unix/Linux: ls, cd, pwd, etc.

Basic Commands in Unix/Linux: ls, cd, pwd, etc. Basic Commands in Unix/Linux: ls, cd, pwd, etc.

Basic Commands in Unix/Linux: ls, cd, pwd, and more

1. ls: List Directory Contents

The ls command is used to list the contents of a directory. By default, it lists the contents of the current directory.

Syntax:

ls [options] [directory]

Common Options:

  • -l: Long listing format (includes file permissions, number of links, owner, group, size, and timestamp)
  • -a: Show all files, including hidden ones (those starting with a dot)
  • -h: Human-readable format (for sizes, e.g., KB, MB)

Example:

ls -lah

2. cd: Change Directory

The cd command allows you to navigate between directories.

Syntax:

cd [directory]

Examples:

  • To move to a subdirectory:
    • cd subdirectory_name
  • To go up one directory level:
    • cd ..
  • To return to the home directory:
    • cd ~

3. pwd: Print Working Directory

The pwd command prints the full path of the current working directory.

Syntax:

pwd

Example:

pwd

4. mkdir: Make Directory

The mkdir command creates a new directory.

Syntax:

mkdir [options] directory_name

Common Options:

  • -p: Create parent directories as needed

Example:

mkdir -p parent_directory/subdirectory

5. rmdir: Remove Directory

The rmdir command removes an empty directory.

Syntax:

rmdir [directory]

Example:

rmdir empty_directory

6. rm: Remove Files or Directories

The rm command is used to remove files or directories.

Syntax:

rm [options] file_or_directory

Common Options:

  • -r: Remove directories and their contents recursively
  • -f: Force removal without prompting for confirmation

Example:

rm -rf directory_to_remove

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