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decrease boot time.md

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See what is slowing down

Following commands help to get a better insight:
systemd-analyze
systemd-analyze blame
systemd-analyze critical-chain

Clean Journal

Limit journal size:

Edit /etc/systemd/journald.conf
Set this line and value:

SystemMaxUse=50M

Clean journal files:

cd /var/log/journal/
sudo rm -r *

Or disable it altogether

sudo systemctl mask systemd-journal-flush.service

!!! Do not mask systemd-journald.service !!!

See in "Mask unnecessary services" at bottom of this page.

Information on masking systemd-journal-flush
Information

Check keyboard service

https://askubuntu.com/questions/919428/keyboard-setup-service-taking-too-long-in-startup-20sec

Remove swapfile

Open this file: /etc/fstab as sudo.
Comment out the swapfile line with a #

Information

Use wicd instead of Network Manager

sudo apt remove network-manager
sudo apt install wicd

Make sure to include wicd-gtk -t in the startup script

Mask unnecessary services

Some services like accounts-daemon.service are unnecessary at startup. To see which services are enabled, use

systemctl list-unit-files --type=service | grep enabled

To mask the above mentioned accounts-daemon.service service:

sudo systemctl mask accounts-daemon.service

To unmask and enable:

sudo systemctl unmask accounts-daemon.service
sudo systemctl enable accounts-daemon.service

Some services which can be masked/disabled are:

  • accounts-daemon.service
  • ModemManager.service
  • keyboard-setup.service
  • systemd-journal-flush.service
  • avahi-daemon.service
  • pppd-dns.service
  • apport.service
  • NetworkManager-wait-online.service

Things to disable/mask
How to disable/enable
Information on masking systemd-journal-flush

Use e4rat:

important step
video
wiki

Delete tmp files:

sudo find /tmp/{*,.??*} -exec rm -rf {} \;

Info

Disable file system check at every boot

Edit the default grub file:

sudo nano /etc/default/grub

Add "fastboot" to the GRUB_CMDLINE_LINUX_DEFAULT line. It should look like this:

GRUB_CMDLINE_LINUX_DEFAULT="fastboot"

Save the file. Update grub.

sudo update-grub