What must I do with the systemd-analyze critical chain informations

[Moltke]

Hello Moltke,

Understood the informations coming from systemd-analyze time.
Done your advices

So results are faster boot. 

I now note than
- "vboxadd.service" has disappeared, as expected
- "plymouth-quit-wait.service" now takes 3.5 sec compared with 1min26...
- "nmbd.service" is now the longuest process with 1min 30sec...

i.e with an other computer, i5-6200U @ 2.3GHz, same LL4.8 : kernel 4.259sec and userspace 40.5 sec...
Same order process : vboxadd.service 34 sec and plymouth-quit-wait.service for 33 sec then 6sec and less for all the others process...

Thanks

Laurent

Do any of those computer have a SSD or a HDD? If a SSD then it should definitely start faster than that, if a HDD then it's likely normal since those tend to be slower. By the way, when pasting terminal output in the forum, try using bbcodes, just click on the symbol from the menu above, it helps readbility so it looks like this

Code:

systemd-analyze blame

1min 30.243s nmbd.service
         57.570s resolvconf-pull-resolved.service
         28.391s systemd-journal-flush.service
         27.938s dev-sda1.device
         24.810s mysql.service
         19.786s keyboard-setup.service
         17.993s ufw.service
         16.123s lvm2-monitor.service
         16.070s snapd.service
         15.289s systemd-modules-load.service
         15.232s systemd-tmpfiles-setup-dev.service
         14.623s [email protected]
         11.954s NetworkManager.service
         11.368s udisks2.service
         10.065s ModemManager.service
         10.027s NetworkManager-wait-online.service
          9.007s apparmor.service
          6.220s accounts-daemon.service
          4.621s networking.service
          4.454s console-kit-log-system-start.service
          4.393s lmt-poll.service
          4.379s rsyslog.service
          4.353s networkd-dispatcher.service
          4.241s grub-common.service
          3.478s lightdm.service
          3.472s plymouth-quit-wait.service

It's a lot nicer and easier to read