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Linux, programming and more

Create Nagios Icons

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Nagios

If you ever tried to make Nagios Status-Map a little nicer by adding some dependencies and some pretty icons, you have probably came across some little collections/packs of icons at NagiosExchange.
But if you need a special one, you must do it by yourself.
And you probably noticed that you need images with .gd2 extension
Here is how to convert a PNG image into .gd2 (GD Graphics Library format)

Solution one:

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aptitude install netpbm
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pngtopnm example.png | pnmtopng -transparent =rgb:00/00/00 2>/dev/null | pngtogd2 /proc/self/fd/0 example.gd2 0 1

Solution two:

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aptitude install libgd-tools
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pngtogd2 phone.png phone.gd2 0

Understanding FTP using commands

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FTP and SMTP are simple text based protocols, I show you how to get some files without a graphical FTP-Client.

Connect with Telnet:

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id@acer:~$ telnet debianuser.org 21
Connected to debianuser.org.
USER anonymous
PASS anonymous
PASV
RETR deli-0.8.0-core.iso

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Make your linux speaking

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Speaker

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echo 'you are a loser' | festival --tts
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for count in $(seq 1 10) ; do espeak "Go Away" ; done

Make speaker louder:

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amixer -c 0 sset Master,0 100%;
amixer set Master 100%
# or
amixer set PCM 100%

Another funny things:

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export DISPLAY=:0
xmessage 'YOU ARE BEING WATCHED. MUHAHAHAHahaha'

Dropbox KDE integration

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After working some time with Dropbox I wrote this little python script to make my work with Dropbox more efficient and faster.

With a right click I can Upload my file to my Dropbox account:

Right Click

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#!/usr/bin/env python
# -*- coding:utf-8 -*-
 
import os, sys
 
PUBDIR = '/home/id/Dropbox/Public/'
USERID = 156881168
 
if len(sys.argv) > 1 and os.path.isfile(sys.argv[1]):
 os.popen('cp -f %s %s' % (sys.argv[1], PUBDIR))
 dest = 'https://dl.getdropbox.com/u/%s/%s' % (USERID, sys.argv[1].split('/')[-1])
 os.popen('kdialog --msgbox "Link was copied to the clipboard:\n%s"' % dest)
 os.system('dbus-send --print-reply --dest=org.kde.klipper \
    /klipper org.kde.klipper.klipper.setClipboardContents string:"%s"' % dest)
else:
 os.popen('kdialog --error "Please choose file!"')

Add a menu entry for right click:

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vim /usr/share/kde4/services/ServiceMenus/dropbox.desktop
cat /usr/share/kde4/services/ServiceMenus/dropbox.desktop
 
[Desktop Entry]
Type=Service
ServiceTypes=KonqPopupMenu/Plugin,all/allfiles
Actions=DropboxURL
X-KDE-Priority=TopLevel
 
[Desktop Action DropboxURL]
Name=Share on DropBox
Icon=/home/id/Pictures/dropbox.png
Exec=/home/id/drop_IT.py "%u" %d

Update:
If you want to make it work only for special users on the system, put dropbox.desktop in your home directory: “~/.kde/share/kde4/services/ServiceMenus”

Another bash based script:

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#!/bin/bash
 
DROPDIR=/home/id/Dropbox/Public/
USERID=156881168
 
if [ -e "$1" ]
then
        cp -f "$1" "$DROPDIR"
        file=`basename "$1"`
        link="http://dl.getdropbox.com/u/$USERID/$file"
        notify-send -i go-down "Dropbox" "Link to \"$file\" was copied to the clipboard"
        echo "$link" | xsel -bi
else
        notify-send -i go-down "Dropbox" "Please choose file!!"
fi

Icon — Could be a pretty icon (16×16) Icon Dropbox Upload
Exec — path to you *.py script

Upgrade Debian lenny to squeeze

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Debian Logo

This upgrade from lenny to squeeze is not more complexer then the update from etch to lenny.
If you read everything carefully your server will run after upgrade too:)

Before you go on please read the official Debian release notes:

Recording your session:

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script -t 2>~/upgrade-squeezestep.time -a ~/upgrade-squeezestep.script

First you should update your running system:

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aptitude update && aptitude dist-upgrade

Check the package state:

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dpkg --audit

It will show any packages which have a status of Half-Installed or Failed-Config, and those with any error status.

If you had a kernel upgrade please reboot. After successfully updates replace the sources from lenny to squeeze:
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