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How To Search Shell Command History

Q. How do I search old command history under bash shell? How do I display or modify previous commands?

A. Almost all modern shell allows you to search command history if enabled by user. Use history command to display the history list with line numbers. Lines listed with with a * have been modified by user.

Shell history search command

Type history at a shell prompt:
$ history
Output:
Sample output:

  6  du -c
    7  du -ch
    8  ls [01-15]*-2008
    9  ls -ld [01-15]*-2008
   10  ls -ld [1-15]*-2008
   11  ls -ld [0]*-2008
   12  ls -ld [01]*-2008
   13  rm -vrf [01]*-2008
   14  du -ch
   15  ls
   16  cd
   17  umount /mnt
   18  df -H
   19  vnstat
   20  yum update
   21  vnstat -m
   22  vnstat -m -i eth0
....
...
  996  ping router.nixcraft.in
  997  ssh vivek@p1.vpn.nixcraft.in
  998  alias
  999  ~/scripts/clean.rss --fetch
 1000  vnstat
 1001  ~/scripts/clean.rss  --update

To search particular command, enter:
$ history | grep command-name
$ history | egrep -i 'scp|ssh|ftp'

Emacs Line-Edit Mode Command History Searching

To get previous command containing string, hit [CTRL]+[r] followed by search string:

(reverse-i-search): 

To get previous command, hit [CTRL]+[p]. You can also use up arrow key.

CTRL-p

To get next command, hit [CTRL]+[n]. You can also use down arrow key.

CTRL-n

fc command

fc stands for either "find command" or "fix command. For example list last 10 command, enter:
$ fc -l 10
To list commands 130 through 150, enter:
$ fc -l 130 150
To list all commands since the last command beginning with ssh, enter:
$ fc -l ssh
You can edit commands 1 through 5 using vi text editor, enter:
$ fc -e vi 1 5

Delete command history

The -c option causes the history list to be cleared by deleting all of the entries:
$ history -c

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{ 15 comments… add one }

  • senthil March 7, 2008, 9:07 pm

    hopefully looking for some tricks

  • Binny V A March 9, 2008, 5:45 pm

    To run a command whose number you know…
    !203

    Runs the 203rd command in history

  • Cuetz March 10, 2008, 5:23 pm

    You can press + and type some command:

    For example

    ‘+ cd’

    immediately apear the last command that match with ‘cd’ if you press + again, you can brows trough all the cd commands you has entered in your history

    • Addy October 28, 2010, 6:26 am

      this dint work on ubuntu 4 me!!

  • Naresh September 7, 2009, 9:25 am

    These r really helpful to every Linux user.

  • Amy August 31, 2010, 10:52 am

    This acts as a guide for us… :-)

  • raja kashif February 18, 2011, 9:48 am

    plz tell me that how we a order make

  • M.S. Babaei April 7, 2011, 8:31 pm

    How to clear history in sh?
    Does fc command clears history?

  • chaitanya October 7, 2011, 3:03 am

    how to know the full history of shell from the starting of first day

  • Anupama August 31, 2012, 3:17 am

    Is there a way to retrieve command history in a shell script?

    • Ashish Singhi September 10, 2012, 12:27 pm

      No. Within a script, the history mechanism is disabled.

  • Rukki September 17, 2012, 1:26 pm

    How to recover cleared history again..??
    I mean after pressing history -c..Please Help Me.:)

  • Frank Kim July 7, 2014, 2:00 pm

    Thanks. Awesome summary.

  • Openies January 16, 2015, 6:01 am

    make a entry of

    hgrep () {
    history | egrep –color=auto –recursive “$@”
    }

    In .bashrc file.

    it will allow you to search history like

    history ssh

    output:
    21 ssh openerp@odoo.openies.com
    22 ssh openerp@odoo.openies.com
    26 ssh root@odoo.openies.com

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