Display the history and optionally grep

h() { if [ -z "$1" ]; then history; else history | grep "$@"; fi; }
Place this in your .bash_profile and you can use it two different ways. If you issue 'h' on its own, then it acts like the history command. If you issue: h cd Then it will display all the history with the word 'cd'

7
By: haivu
2009-10-13 21:49:37

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  • By defining a function "gh" as shown here, it saves me typing "history | grep" every time I need to search my shell history because now I only have to type "gh". A nifty time saver :-) You can also add the "gh" function definition to your .bashrc so it is defined each time you login. (updated 2015_01_29: changed from hg to gh to avoid clash with that other hg command. mnemonic: gh = grep history) Show Sample Output


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    echo 'export HISTTIMEFORMAT="%d/%m/%y %T "' >> ~/.bash_profile
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  • Top 30 History Command line with histogram display Show Sample Output


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What Others Think

Nice. I use ! instead of 'h'. Because bash won't allow a function called !, I create a function like yours and then: alias !=h Now I have: ! # show history ! cd # show all matching commands !! # last command as normal
flatcap · 452 weeks and 6 days ago
@flatcap: using ! is very creative. I have not thought of it.
haivu · 452 weeks and 6 days ago
This is a bit shorter and protects the grep from '-' character - so you can search for previous uses of option strings: hist() { history |grep -- ${@:-.};}
bhepple · 446 weeks and 6 days ago
@bhepple: Nice!
haivu · 446 weeks and 6 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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