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How to Change Default OS on Boot

If you are using multi OS on the same computer, you are probably using grub as bootloader. It's Ubuntu's default loader.

This grub, makes Ubuntu as default OS to load on boot. If you prefer another OS to load at that stage, Windows - for example, you can configure grub by using gedit:

sudo gedit /etc/default/grub

It will open a gedit editor.

If you change this file, run ‘update-grub’ afterwards to update
# /boot/grub/grub.cfg.

GRUB_DEFAULT=0
#GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash”
GRUB_CMDLINE_LINUX=”"

# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo’
#GRUB_GFXMODE=640×480

# Uncomment if you don’t want GRUB to pass “root=UUID=xxx” parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true

# Uncomment to disable generation of recovery mode menu entrys
#GRUB_DISABLE_LINUX_RECOVERY=”true”


You have to change the value of GRUB_DEFAULT. The default is 0, which represents the first line of the OS list on your computer (numbering starts from 0). So, if your Windows is on the fourth line, you change the number to 3.

If you're looking for a more convenient way to do this, try sudo apt-get install startupmanager, it's a GUI grub configuring tool.

#PS: don't forget to run sudo update-grub after you manualy edited grub config in gedit. You don't have to do this if you're using startupmanager, the GUI version.
Sunday, June 13, 2010 | 1 Comment | Posted in ,
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How to Open 7zip Files on Ubuntu

You can open 7zip files on Ubuntu by installing p7zip package first:
sudo apt-get install p7zip

If you have File Roller, when you click on 7zip files in Nautilus, Archive Manager will handle your 7zip file.

Or you can use Command Line Interface (CLI) instead:
$p7zip -d a-7zip-file.7z
Tuesday, June 8, 2010 | No Comments | Posted in ,
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avast! Antivirus for Ubuntu

Logos II -- Which one is your favorite?


Virus attacks are common in Windows systems and happen less in Linux systems. But, for prevention, you can install an antivirus in Ubuntu just in case of bad things happened.

One of antivirus that I installed on my Ubuntu system is avast! Antivirus. You can install it with this command:


wget http://files.avast.com/files/linux/avast4workstation_1.3.0-2_i386.deb && sudo dpkg -i avast4workstation_1.3.0-2_i386.deb

Then you can access it in Accessories → avast! Antivirus.

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Thursday, May 27, 2010 | No Comments | Posted in ,
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CHM reader untuk Ubuntu

Ada berbagai jenis CHM (Microsoft Compiled HTML Help) reader yang tersedia untuk sistem operasi Ubuntu, seperti gnochm, xchm, kchmviewer, dan sebagainya. Dari berbagai pilihan tersebut, saya lebih suka menggunakan xchm untuk membaca file Compiled HTML Help dalam Ubuntu.

Ubuntu menggunakan desktop Gnome. Sebenarnya, gnochm lebih didukung oleh Gnome. Namun saya kurang suka menggunakan gnochm karena dari pengalaman saya font yang ditampilkan tidak proporsional. Kadang terlalu besar, kadang terlalu kecil. Selain itu, seringkali gnochm mengalami crash dan aplikasi tertutup dengan paksa.

Saya kemudian mencoba aplikasi CHM reader lain, yaitu xchm. Aplikasi ini lebih bagus dalam menampilkan file CHM dan lebih nyaman digunakan untuk membaca file CHM.

Jika tertarik, anda bisa memasangnya di sistem Ubuntu dengan cara mengetikkan perintah ini di terminal:

sudo apt-get install xchm

Selamat membaca! :-)
Wednesday, May 26, 2010 | No Comments | Posted in