Appendix J. 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. $HISTTIMEFORMAT (Bash, ver. 3.0 or later)

8. !!

9. !$

10. !#

11. !N

12. !-N

13. !STRING

14. !?STRING?

15. ^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)

The Advancing in the Bash Shell site gives a good introduction to the use of history commands in Bash.