ls-and-cp.md

Common ls Options

• 1. ls -l (Long Format)
  Displays detailed information about files, including permissions, owner, size, and last modified date.

  $ ls -l

  Example output:
  -rw-r--r-- 1 user user 4096 Oct 11 10:15 file.txt

• 2. ls -a (All Files)
  Lists all files, including hidden files (files starting with .).

  $ ls -a

  Example output:
  .bashrc .hiddenfile Documents/

• 3. ls -h (Human-Readable Format)
  Displays file sizes in human-readable format (e.g., KB, MB).

  $ ls -lh

  Example output:
  -rw-r--r-- 1 user user 4.0K Oct 11 10:15 file.txt

• 4. ls -r (Reverse Order)
  Lists files and directories in reverse order.

  $ ls -r

  Example output:
  Videos/ Pictures/ Downloads/ Documents/

• 5. ls -t (Sort by Modification Time)
  Sorts files by their modification time, with the most recently modified files appearing first.

  $ ls -lt

  Example output:
  -rw-r--r-- 1 user user 4096 Oct 11 10:15 recent.txt

• 6. ls -S (Sort by Size)
  Sorts files by size, with the largest files displayed first.

  $ ls -lS

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To copy a folder in Linux, you can use the cp command with the -r (recursive) option. Here's how it works:

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Copying a Folder in Linux

• Basic Syntax:

  cp -r <source_folder> <destination>

• Key Option:

  • -r or --recursive: This tells cp to copy all files and subdirectories inside the folder recursively.

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Examples of Copying a Folder

1. Copy a folder to another location:

   cp -r /home/user/Documents/project /home/user/Backup/

   This will copy the project folder and all its contents to the Backup directory.

2. Copy a folder and rename it:

   cp -r /home/user/Documents/project /home/user/Backup/project_copy

   This will copy the project folder and rename the copied version to project_copy in the Backup directory.

3. Copy a folder to the current directory:

   cp -r /home/user/Documents/project .

   This will copy the project folder from /Documents to the current working directory.

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