Faster Boot Linux

1. Check speed of loading

Just type on your favourite terminal to get know your

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systemd-analyze

As you can see above, full time to booting is 59,301s with specific below

2. Know which suspect

Know which the suspect to be blaming to we can type on terminal like below:

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systemd-analyze blame

Resulting

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6.681s NetworkManager-wait-online.service
5.051s bolt.service
2.954s systemd-udev-settle.service
1.917s blueman-mechanism.service
1.680s mariadb.service
1.238s networkd-dispatcher.service
 950ms udisks2.service
 948ms apache2.service
 885ms accounts-daemon.service
 749ms ModemManager.service
 683ms dev-sda6.device
 446ms cups.service
 423ms user@1000.service
 407ms ubuntu-system-adjustments.service
 402ms gdm.service
 378ms power-profiles-daemon.service
 370ms polkit.service
 364ms avahi-daemon.service
 363ms bluetooth.service

Look above, NetworkManager-wait-online.service took 6,6s then bolt.service took 5s. It may vary depend on your system.

3. Reduce it!

To reduce this to boot on initial, can just mask using systemctl

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sudo systemctl mask NetworkManager-wait-online.service
sudo systemctl mask bolt.service
etc . . .

4. Change compression

By changing the compression algorithm, we can save some time as some algorithms are faster to decompress the data. I’ve found that lz4 is the fastest for my case. It may vary for your CPU. The image is 6.6MB now, but it decompresses a lot faster.

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$ sudo vi /etc/initramfs-tools/initramfs.conf

MODULES=dep
COMPRESS=lz4

$ sudo update-initramfs -u

5. Check Result

After two treatments above, we can repeat systemd-analyze again.

Horay!!! That is great improvement. From total 59 s to 26 s