On Sat, Jan 01, 2005 at 02:52:12PM +0800, Smith a wrote: > when i am in command line , i often use up arrow key to get commands used > before, but if i have used a command several times, the up arrow key will > display the same command several times, this is not welcome. > ~/.bash_history contains the commands used before, can the shell display > the same command just once?
Add the following to the .bashrc in you home directory: export HISTCONTROL=ignoreboth Look at the bash manual for more options to HISTCONTROL. You need to logout and login again for this to take effect. Somewhat related: with CONTROL-R you can search backwards in your history when on the command line. It can be quite a time saver. I think that's only when you're in emacs-compatible mode. HTH, -- Maurits van Rees | http://maurits.vanrees.org/ [Dutch/Nederlands] Public GnuPG key: keyserver.net ID 0x1735C5C2 "Let your advance worrying become advance thinking and planning." - Winston Churchill
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