Appendix F. History Commands

The Bash shell provides command-line tools for editing and manipulating a user's command history. This is primarily a convenience, a means of saving keystrokes.

Bash history commands:

1. history

2. fc

bash$ history
   1  mount /mnt/cdrom
    2  cd /mnt/cdrom
    3  ls
     ...
	      

Internal variables associated with Bash history commands:

1. $HISTCMD

2. $HISTCONTROL

3. $HISTIGNORE

4. $HISTFILE

5. $HISTFILESIZE

6. $HISTSIZE

7. !!

8. !$

9. !#

10. !N

11. !-N

12. !STRING

13. !?STRING?

14. ^STRING^string^

Unfortunately, the Bash history tools find no use in scripting.

#!/bin/bash
# history.sh
# Attempt to use 'history' command in a script.

history

# Script produces no output.
# History commands do not work within a script.

bash$ ./history.sh
(no output)