Category Archives: Linux

Add syntax color to crontab editor

You might be wondering why you don’t have syntax coloring when you are editing crontab entries.
This can be solved very simply by specifying your editor before starting crontab:

export EDITOR=vim

The change can be made persistent across the whole system if you add that line on the /etc/bashrc file.
You you only need this change for certain users only, add the line to their local ~/.bashrc files.

Disable recent documents in Gtk2/Gtk3

Use the following to disable recent documents in Gtk2/Gtk3:

echo 'gtk-recent-files-max-age=0' | tee -a $HOME/.gtkrc-2.0
echo 'gtk-recent-files-max-age=0' | tee -a $HOME/.config/gtk-3.0/settings.ini

The ugly part is that there is no way one can disable ‘Recently Used’ in the GtkFileChooser dialog box.


screenshot-20120307@111318

Quick way to convert Mbox mailboxes to Maildir format

A quick way to convert Mbox mailboxes to Mbox format is to use mb2md.
Install it in Ubuntu/Debian using:

sudo aptitude install mb2md

To make the convertion use:

mb2md -m

From man:

       -m        If this is used then the source will be the single mailbox at /var/spool/mail/blah for user blah and the destination mail‐
                 box will be the "destdir" mailbox itself.

Nice and simple!

Bash script to backup my configs (dotfiles)

I needed some script to take care of my config files and put them in a single directory. So here it is.

#!/bin/bash
 
# Display All Hidden Dot Files In a Directory
# ls -a | egrep "^\." > backup_dotfiles.sh
 
DESTINATION="/storage/dotfiles"  # do not use a trailing slash (/)
 
# Colors
blue="\e[0;34m"
green="\e[1;32m"
red="\e[0;31m"
bold="\e[1;30m"
reset="\e[0m"
 
# file list (use trailing slash for directories)
FILES="
.bash_aliases
.bash_logout
.bash_profile
.bashrc
.colours/
.config/openbox/
.config/terminator/
.config/tint2/
.config/zathura/
.devilspie/
.fehbg
.fonts.conf
.gtk-bookmarks
.gtkrc-2.0
.gtkrc-2.0.mine
.inputrc
.mplayer/
.nanorc
.rtorrent.rc
.screenrc
.synergy.conf
.vim/colors/
.vimrc
.xbindkeysrc
.Xdefaults
.xinitrc
.xmod
.Xmodmap
.xsession
.xxkb/
.xxkbrc
"
for file in $FILES
do
   if [ -d $file ]; then
      mkdir -p $DESTINATION/$file
      cp -f $HOME/$file* $DESTINATION/$file
   elif [ -f $file ]; then
      cp -f $HOME/$file $DESTINATION
   else
      echo -e "$red:: $file is not a file/directory! $reset"
   fi     
done
 
echo -e "$green:: Done! $reset"
exit 0

Moved to ArchLinux!

Moved my ThinkPad T61 to ArchLinux! (Still using Ubuntu on many other machines.)

Screenshot:
2011-06-16-215838_1680x1050_scrot
I will post some install script I used to configure my system.

Liferea custom stylesheet

I don’t like very much the default font used by Liferea, so I decided to use my custom font. Here is how:
1. Copy the default stylesheet to liferea folder in my $HOME:

cp /usr/share/liferea/css/liferea.css $HOME/.liferea_1.6

2. Add this:

{
	font-family: Aurulent Sans;
}

at the begining of liferea.css file.

This is how it looks now:
screenshot-20110616@203706

Of course, you can also play with all the other options in the liferea.css.
Have fun!

Just installed Archlinux on my ThinkPad T61

I’ve installed Archlinux on my ThinkPad T61 about a week ago and so far I am impressed.
I will post more info about the tweaks and customisations I’ve done to make everything work.
Check out the screenshots page.

Quick gnome tweaks

Here are some tweaks for your gnome:

Print all subdirectories and entries under a dir, recursively:

gconftool-2 -R /

Change GDM font:

sudo -u gdm gconftool-2 --set --type string \
/desktop/gnome/interface/document_font_name "Ubuntu"
sudo -u gdm gconftool-2 --set --type string \
/desktop/gnome/interface/font_name "Ubuntu"
sudo -u gdm gconftool-2 --set --type string \
/desktop/gnome/interface/monospace_font_name "Monospace"

Change GDM backgound:

sudo -u gdm gconftool-2 --set --type string \
/desktop/gnome/background/picture_filename "/path/to_image"

Set default gnome terminal size in Lucid Lynx

Use these commands to change the default gnome terminal size:

gconftool-2 --set /apps/gnome-terminal/profiles/Default/default_size_columns \
--type integer 160
gconftool-2 --set /apps/gnome-terminal/profiles/Default/default_size_rows \
--type integer 50

XMLStarlet: command line XML toolkit

XMLStarlet is a set of command line utilities (tools) which can be used to transform, query, validate, and edit XML documents and files using simple set of shell commands in similar way it is done for plain text files using UNIX grep, sed, awk, diff, patch, join, etc commands.

This set of command line utilities can be used by those who deal with many XML documents on UNIX shell command prompt as well as for automated XML processing with shell scripts.
Ubuntu allready has it in the repos, so issue the following command in your terminal to install it:

sudo aptitude install xmlstarlet

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