Toolbox Aid

August 9th, 2024 2:27 PM Mr. Q Categories: Command

history: Display or manipulate the command history list.

Description: Shows the list of commands previously executed in the shell. Useful for recalling and reusing commands without retyping them.

• Basic Usage:

  history

• Common Arguments:
• -c: Clear the history list.
• -a: Append the new history lines (from the current session) to the history file.
• -r: Read the history file and append its contents to the history list.
• -w: Write the current history list to the history file.
• Executing a Specific History Command:
  To execute a specific command from your history, use the ! operator followed by the history number of the command you want to run. Example:

  !3

This will execute the command listed as number 3 in the history list.

• Sample Command and Output: Command:

  history

Output:

    1  ls
    2  cd /var/log
    3  cat syslog
    4  grep error syslog
    5  history

Command to Execute a Specific History Entry:

  !3

Output:

  cat syslog

Using history in combination with ! allows for quick execution of previously used commands, enhancing productivity and ease of use in the terminal.