Ubuntu 9.04, reducing your boot time.

Hey, searching around the internet, i find some ways to decrease the boot time. All of them were for older versions, tham i decided to try it in new Ubuntu 9.04 (Jaunty Jackalope) and i get 22seconds boot time.

I used the bum (sudo apt-get install bum) to remove some things that i don’t use.
This thins are:
acpid – Controls energy/buttons in pc/Laptop. If you don’t use notebook or a keyboard with hotkeys you can remove it.
acpi-support – Like above.
hotkey-setup – Similar above.
anacron – This system runs processes periodically. You could remove it, and use cron.
atd – Like cron, Task Scheduler.
bluetooth – Bluetooth support
usplash – Without this, you don’t see a beautifull loading screen when booting.
dns-clean – Used by dial-up connections.
pppd-dns – Used by dial-up connections.
saned – A lib for scanners.

Remember, i removed this things, like bluetooth and acpid because i don’t use it. You shouldn’t remove it, if you use. You must choose what item to remove according to your system.

Use:
$ sudo pico /boot/grub/menu.lst
and remove splash.

kernel /boot/vmlinuz-2.6.28-11-generic root=UUID=5be10a48-2c12-4165-8957-81c7a15274e5 ro quie splash
turned
kernel /boot/vmlinuz-2.6.28-11-generic root=UUID=5be10a48-2c12-4165-8957-81c7a15274e5 ro quie

Reboot the system and executed the profiler. Press “e” in grub to edit, add to line that starts with “kernel” the word profile (add it in the end). Press “B” to boot. Wait a while, your boot is going to be slow. After this, reboot and see your boot time in bootchart.

If you want you can use Concurrent boot. To use it you have to edit /etc/init.d/rc
$sudo pico /etc/init.d/rc

And change
CONCURRENCY=none
to
CONCURRENCY=shell

Save and restart. Verify your boot time and decide if you want to use it or not. (Probabily if you don’t change boot order in rcX.d, You will not see difference.)

Usei o sudo bum (apt-get install bum) para remover algumas coisas que eu não usava.
As coisas removidas foram as seguintes:
acpid РServe para gerenciar a energia/controles do pc/laptop. Se voc̻ ṇo usa um notebook ou teclado com teclas te atalho pode remover.
acpi-support – Para notebooks. Como o de cima.
hotkey-setup – Semelhante ao anterior.
anacron РEste sistema roda processos periodicamente. Voc̻ pode remove-lo e colocar servi̤os criticos para cron
atd РComo o cron, esse tamb̩m ̩ um agendador de tarefas.
bluetooth – Suporte a Bluetooth
usplash – Remove a tela bonitinha de loading, aparecendo um monte de mensagens na tela. (remover splash da grub tbm. Abaixo)
dns-clean РUtilizado para conex̵es dial-up.
pppd-dns РUtilizado para conex̵es dial-up.
saned – Biblioteca para scanners.

Lembrando que removi pois não utilizava certos dispositivos, como bluetooth, agendador de tarefas e notebook. Voce deve ver se remove ou não de acordo com seu sistema.

For now just this, but when i have time I want to rebuild my kernel and see the diferences. Stay calm, i will keep you informed.

Matheus Bratfisch

References:
http://www.extremetech.com/article2/0,2845,2114124,00.asp
http://wiki.ubuntu-br.org/AcelerandoBoot#head-c8957311083b70f08301d9339d1dea3c54c1c9ae
http://caarlos0.wordpress.com/2009/02/09/boot-do-ubuntu-intrepid-em-20-segundos-d/