Posted January 26, 2010
A few days ago I had to create list of email addresses sorted on the
domainname. All addresses with the same name should clump together. Being a
Perl programmer, I quickly wanted to write a Perl script to sort this list of
data. Then I tought, why not use Vim to look at the intermediate steps and do
it with filtering. The following is the result.
:%!perl -pe 'm/\@([-\w]+)\./; $_="$1\#$_";'
:%!sort
:%!cut -d\# -f2
The first line parsed the domain from the data and pastes it in front of the
orignal, seperating it with a '#'. The second line obviously sorts the new
list. The final line removes the domain that I put in front. This leaves a
list of the originals.
:%!perl -pe 'm/\@([-\w]+)\./; $_="$1\#$_";' | sort | cut -d\# -f2
This will do it in one line.
Posted November 10, 2009
A few days ago I created two new aliases for places I connect to with ssh.
Both locations have a three character alias now.
To use the aliases I created a new file called ~/.aliases. This file contains
all the aliases I use. This file should be sourced in the ~/.bashrc file with the following command.
source ~/.aliases
Then add the following line to the ~/.aliases file.
alias realias='$EDITOR ~/.aliases; source ~/.aliases'
Restart bash and type realias. It will open an editor to the ~/.aliases file and
source it when your done.
The ssh aliases look like this. You should change hostname1 to the new of your server.
alias ss1='ssh hostname1'
Another useful alias is lt. It shows the files in order of modification. The files
that were changed last, will show up at the bottom.
alias lt='ls -lrt'
Are there any aliases that you like to use?