command stack in buffer

[David Robert Lewis (ethnopunk)]

vijay shanker wrote:
> @ andrew
> Your suggestion does not seems to be working.
> my configuration in ~/.bashrc file
>
> # don't put duplicate lines in the history. See bash(1) for more options
> # don't overwrite GNU Midnight Commander's setting of `ignorespace'.
> export HISTCONTROL=$HISTCONTROL${HISTCONTROL+,}ignoredups
> # ... or force ignoredups and ignorespace
> #export HISTCONTROL=ignoreboth
>
> @patton
>
> Yes; patton this is something I wanted to do. But if my history list 
> is clean without any duplicates; i will end my search on this topic.
>
> :) 
>
>
> Regards,
> Vijay Shanker Dubey
>
>
>
> On Tue, Jan 5, 2010 at 3:14 PM, Patton Echols <p.echols at comcast.net 
> <mailto:p.echols at comcast.net>> wrote:
>
>     On 01/05/2010 12:56 AM, vijay shanker wrote:
>     > Hi all,
>     >
>     > I hope many of you must be aware of this.
>     >
>     > When i use a terminal to execute my commands. Some times i need to
>     > execute same command multiple times. So, if i want to choose
>     > a previously executed command, It makes me very tired to choose from
>     > history of command.
>
>     Do you mean that you don't want to scroll through the history to
>     get to
>     the command you want?
>
>     What I use is [Ctrl]+r  Then start typing the command.  What the shell
>     will do is search back through your commands to the most recent match.
>     Sometimes you need to keep typing a few extra characters to get the
>     right one.
>
>     Example:  I routinely ssh to two different computers.  One is the
>     server
>     in my local network and the command is:
>     $ssh pecho at 192.168.168.5 <mailto:pecho at 192.168.168.5>
>     The other is to vpn and remote desktop to my office using this:
>      ssh -C -p 13254 pecho at xxx.xxx.xxx.xxx -L 5901:localhost:5900
>
>     if [Ctrl]+R "ssh" gives the first one, then I keep typing until I
>     get to
>     "ssh -" and the shell finds the right one.
>
>     Try it!
>     (BTW this is the bash shell which I believe is the standard in Ubuntu)
>     >
>     > So , instead of choosing I prefer to go and write it again. But
>     i was
>     > thinking if there existing any thing that can remove duplicates form
>     > the command history?
>
>
>     >
>     > Regards,
>     > Vijay Shanker Dubey
>     >
>
>

Now that you raise the issue I am keen to try this solution from 
http://blog.macromates.com/2008/working-with-history-in-bash/:

add to bashrc

export HISTCONTROL=erasedups
export HISTCONTROL=1000
shopt -s histappend

The first line will remove duplicates
Second line will increase history size
Third line ensures that when you exit a shell the history from that 
session is appended
to ~/.bash_history

Haven't tried it yet, let me know if it works. :)