Instantly load bash history of one shell into another running shell

$ history -a #in one shell , and $ history -r #in another running shell
By default bash history of a shell is appended (appended on Ubuntu by default: Look for 'shopt -s histappend' in ~/.bashrc) to history file only after that shell exits. Although after having written to the history file, other running shells do *not* inherit that history - only newly launched shells do. This pair of commands alleviate that.
Sample Output
## In shell one ##

$ find -iname "*pdf*"   
<some output>

$ history -a   #You don't need this if you set PROMPT_COMMAND="history -a;$PROMPT_COMMAND" manually or in your ~/.profile or ~/.bashrc


## Switch to another running shell ##

$ #Up arrow does not show the above 'find' command, so do following:
$ history -r
$ find -iname "*pdf*"   #Up arrow now shows the 'find' command

10
By: b_t
2011-11-05 01:19:30

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?

You must be signed in to comment.

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands



Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: