delete a line from your shell history

history -d
If you're a moron like me, sometimes your fingers get away from you and you, for example, enter your password when you're already authenticated to ssh-agent, sudo, etc., and your password ends up in shell history. Here's how to get it out.
Sample Output
ssh host
mypass
-bash: mypass: command not found
history
    1  mypass
    2  history
history -d 1
history
    1  history

29
By: sud0er
2009-04-27 20:19:09

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    $ history -a #in one shell , and $ history -r #in another running shell
    b_t · 2011-11-05 01:19:30 0
  • This could be added to .bashrc. Background: Linux usually saves history only on clean exit of shell. If shell ends unclean, history is lost. Also numerous terminals might confuse their history. With this variable set, history is immedeately written, accessible to all other open shells.


    2
    PROMPT_COMMAND="history -a"
    danam · 2009-10-21 12:33:25 0
  • I rarely need this, but I have a hard time remembering the command when I need it. Admit it. This has happened to you. Yes this is bad, and you better clean up now. Borrowed from http://thoughtsbyclayg.blogspot.com/2008/02/how-to-delete-last-command-from-bash.html Show Sample Output


    0
    alias histdel='history -d $((HISTCMD-2)) && history -d $((HISTCMD-1))'
    StefanLasiewski · 2010-07-02 00:20:44 3
  • #

    Using the "#" in shell is surprisingly useful. Some of the uses I found: a) As a visible copy buffer in shell history (caveat: do not use for passwords :-) b) To build complex commands until ready then hit the HOME, DEL, ENTER keys to run it c) Placing reference data into shell history (search for tags with CTRL-R TAGNAME) d) Putting aside a "work in progress" command to focus on another task (HOME # ENTER) Show Sample Output


    -4
    # indicates a comment in shell
    mpb · 2009-03-16 23:15:33 0

What Others Think

I have to use this one quite often. My usage isn't usually to remove passwords, but because I've accidentally pasted a large number of lines into a terminal window. Have to use a for loop to delete a bunch of lines.
fritz_monroe · 477 weeks and 4 days ago
Wow, commandlinefu just taught me the fix for an annoyance I have had for years! Thanks so much.
philiph · 477 weeks ago
You can also remove the command by moving to the command and delete that line. And followed by up/down key (not enter), the command will be erased.
ckclark · 430 weeks and 3 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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