Commands tagged bash

This alias is meant to append n (here is n=10) most recently used cd commands to the bottom of history file. This way you can easily change to one of previous visited directories simply by hitting 1-10 times arrow up key.

Hint: You can make more aliases implying the same rule for any set of frequently used long and complex commands like: mkisof, rdesktop, gpg...

Inspired by: http://www.commandlinefu.com/commands/view/8744/search-google-on-os-x

Ive aliased this script as 'google' on my system and I can type 'google "search terms"' to open firefox with my search terms. My first post here, if there are any improvements to be made please let me know in the comments.

Actually $! is an internal variable containing PID of the last job in background.

More info: http://tldp.org/LDP/abs/html/internalvariables.html#PIDVARREF

Using $! for job control:

Uses history to get the last n+1 commands (since this command will appear as the most recent), then strips out the line number and this command using sed, and appends the commands to a file.

Newer versions of Dropbox let you choose the location for your Dropbox folder. If you use script to put things into your Dropbox folder (todo list, screenshots, torrents etc.) but have the Dropbox folder in different locations on your other computers this lets you use the same script on all systems without having to tell it where the Dropbox folder is.

urldecode files in current directrory

This should probably only be used for testing in a dev environment as it's not terribly efficient, but if you're doing something that might trash a DB and you still want the old data available, this works like a charm.

Defines a function to geolocate a given IP address; if none supplied, will default to your external IP address.

This way, you can specify how many hours in which you want your machine to shut down.

Improved version of command #8425.

This way, the default browser is used, as opposed to Firefox.

Just to avoid link to itself

If your admin has disabled Apache's directory index feature but you want to have a cheap way to enable it for one folder, this command will just create an index.html file with a link to each file in the directory (including the index.html file, which is not ideal but makes the command much simpler). The HTML isn't even remotely compliant, but it could easily be improved on. Also, the command needs to be run each time a file is added or removed to update the index.html file.

Bash function copies a file prefixed with a version number to a subdirectory

This one-liner greps first 30 direct URLs for .torrent files matching your search querry, ordered by number of seeds (descending; determined by the second number after your querry, in this case 7; for other options just check the site via your favorite web-browser).

You don't have to care about grepping the torrent names as well, because they are already included in the .torrent URL (except for spaces and some other characters replaced by underscores, but still human-readable).

Be sure to have some http://isup.me/ macro handy (someone often kicks the ethernet cables out of their servers ;) ).

I've also coded a more user-friendly ash (should be BASH compatible) script, which also lists the total size of download and number of seeds/peers (available at http://saironiq.blogspot.com/2011/04/my-shell-scripts-4-thepiratebayorg.html - may need some tweaking, as it was written for a router running OpenWrt and transmission).

Happy downloading!

BASH: Print shell variable into AWK

Sometimes you might need to have two copies of data that is in tar. You might unpack, and then copy, but if IO is slow, you might lower it by automatically writing it twice (or more times)

Alternatively:

export MyVAR=84; awk '{ print ENVIRON["MyVAR"] }'