Dieter on the web

I've been thinking about how a specific bash history for each directory could improve productivity, and unlike what I feared it was actually pretty easy to find a solution on the net.

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Often while you're occupied with something, some thought pops into your head. Something that you want to remember/do something about.

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I've been reading GTD lately and it's absolutely a great and inspiring book.
Having made my home office space into a real Zen I want to start implementing GTD in my digital life but it seems very hard to find a good GTD tool that fully implements GTD. (even though there are a lot of tools out there)

The most interesting ones (each for different reasons) I've looked at so far are Thinkingrock, tracks and yagtd (the latter requiring most work before it does everything I need, but it's also the most easy to dive into the code base). I'm keeping my eyes open because there are certainly more things to discover.

Even though there are probably no applications out there that can do everything I want, I just wanted to share my feature-wishlist. These are the requirements I find that a really good tool should comply with:


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When you're stuck on a problem, or not even stuck but you just want to boost your creative/out-of-the-box thinking...
Take a shower. When I'm thinking about a problem and I take a shower, the ideas and thoughts just start popping up, one after each other, or sometimes even two at the same time. It's amazing. And it works every time.

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For a while now I am typing using solely the Dvorak keyboard layout. I roughly estimate it has been 4 or 5 months now - with the first month being a pain in the ass because i had to relearn typing pretty much from scratch - but now my typing speed is starting to exceed what it used to be in querty, and I still have much headroom to improve.

For those who have no clue what I'm talking about: think for 30 seconds which characters you type the most and which the least (eg: which characters occur the most/least in the language you type?).

Ok you got them? Now look at your keyboard and spot where these characters are. Now consider where your fingers are most of the time (if you've never learned to type: the 'base position' for your fingers is on the middle row). Notice anything strange?

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Hello everyone.
This post is about bash, the shell providing so many users easy access to the underlying power of their system.
(not bash the quote database, although i really like that website too ;-) )
Most people know the basics, but getting to know it better can really increase your productivity. And when that happens, you might start loving bash as much as I do ;-)

I assume you have a basic knowledge of bash, the history mechanism, and ~/.bash* files.
So here they are, my favorite tricks, key combo's and some bonus stuff:

Tricks

• "cd -" takes you back to the previous directory, wherever that was. Press again to cycle back.
• putting arguments between braces {like,so} will execute the command multiple times, once for each "argument". Bash will make the cartesian product when doing it multiple times in 1 expression. Some less-obvious tricks with this method are mentioned here
• HISTIGNORE : with this variable you have control over which things are being saved in your history. Here is a nice explication. Especially the space trick is very useful imho.
• CD_PATH : Here is a great explanation ;-)
• readline (library used by bash) trick: put this in your ~/.inputrc (or /etc/inputrc) :
  

  "\e[5~": history-search-backward
  "\e[6~": history-search-forward
  

  This way you can do *something*+pageup/pagedown to cycle through your history for commands starting with *something*
  You can use the up/down arrows too, their codes are "\e[A" and "\e[B"

• for more "natural" history saving behavior (when having several terminals open): put this in .bash_profile:
  
  

  PROMPT_COMMAND='history -a'
  

  (write each command separately in a new entry, instead of all at shell exit).
  And type

  shopt -s histappend
  

  to append instead of overwrite. (this might be default on some distro's. I think it was on Gentoo)

Shortcuts/keycombos

• ctrl+r : search through your history. Repeatedly press ctrl+r to cycle through hits.
• ctrl-u : cut everything on the current line before the cursor.
• ctrl-y : paste text that was cut using ctrl-u. (starting at the cursor)
• !$: equals the last word of the previous command. (great when performing several operations on the same file)

Bonus material

• Bash completion, an add-on for bash which adds completion for arguments of your commands. It's pretty smart and configurable. (it's in portage, and probably in repos of all popular distros out there)
• This script provides you an interface to the rafb pastebin!
• Recursively delete all .svn folders in this folder, and in folders below. "find . -name .svn -print0 | xargs -0 rm -rf"
• Recursively count number of files in a directory: "find -not -type d | wc -l"

Conclusion

Those were all important tricks I'm currently using. On the web you'll find lots more useful tips :-).
If that still isn't enough, there is also man bash :o

With aliases and scripts (and involving tools like sed or awk) the possibilities become pretty much endless. But for that I refer to tldp.org and your favorite web search engine.