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New to linux and ubuntu. I have shared my laptop info. Boot up time is sooooo slowwwww. Even lauch of firefox takes long time.

Can anyone help me figure out how to optimize my system?

Using Lubuntu (Ubuntu Version)

Command

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04.2 LTS
Release:    18.04
Codename:   bionic

Command

$ sudo lshw -short
H/W path         Device     Class          Description
======================================================
                            system         Aspire A515-51G (0000000000000000)
/0                          bus            Charmander_KL
/0/0                        memory         128KiB BIOS
/0/4                        processor      Intel(R) Core(TM) i5-8250U CPU @ 1.60
/0/4/5                      memory         256KiB L1 cache
/0/4/6                      memory         1MiB L2 cache
/0/4/7                      memory         6MiB L3 cache
/0/d                        memory         4GiB System Memory
/0/d/0                      memory         4GiB SODIMM DDR4 Synchronous Unbuffer
/0/d/1                      memory         [empty]
/0/100                      bridge         Xeon E3-1200 v6/7th Gen Core Processo
/0/100/2                    display        UHD Graphics 620
/0/100/14                   bus            Sunrise Point-LP USB 3.0 xHCI Control
/0/100/14/0      usb1       bus            xHCI Host Controller
/0/100/14/0/5               communication  Bluetooth wireless interface
/0/100/14/0/7               multimedia     HD WebCam
/0/100/14/1      usb2       bus            xHCI Host Controller
/0/100/15                   generic        Sunrise Point-LP Serial IO I2C Contro
/0/100/15.1                 generic        Sunrise Point-LP Serial IO I2C Contro
/0/100/16                   communication  Sunrise Point-LP CSME HECI #1
/0/100/17                   storage        Sunrise Point-LP SATA Controller [AHC
/0/100/1c                   bridge         Sunrise Point-LP PCI Express Root Por
/0/100/1c/0                 display        GP108M [GeForce MX150]
/0/100/1c.4                 bridge         Sunrise Point-LP PCI Express Root Por
/0/100/1c.4/0               generic        RTL8411B PCI Express Card Reader
/0/100/1c.4/0.1  enp2s0f1   network        RTL8111/8168/8411 PCI Express Gigabit
/0/100/1c.5                 bridge         Sunrise Point-LP PCI Express Root Por
/0/100/1c.5/0    wlp3s0     network        Dual Band Wireless-AC 3168NGW [Stone 
/0/100/1f                   bridge         Intel(R) 100 Series Chipset Family LP
/0/100/1f.2                 memory         Memory controller
/0/100/1f.3                 multimedia     Sunrise Point-LP HD Audio
/0/100/1f.4                 bus            Sunrise Point-LP SMBus
/0/1             scsi0      storage        
/0/1/0.0.0       /dev/sda   disk           1TB WDC WD10SPZX-21Z
/0/1/0.0.0/1     /dev/sda1  volume         927GiB EXT4 volume
/0/1/0.0.0/2     /dev/sda2  volume         3970MiB Extended partition
/0/1/0.0.0/2/5   /dev/sda5  volume         3970MiB Linux swap volume

Used this command

$ systemd-analyze critical-chain
The time after the unit is active or started is printed after the "@" character.
The time the unit takes to start is printed after the "+" character.

graphical.target @1min 6.870s
└─multi-user.target @1min 6.870s
  └─kerneloops.service @1min 6.842s +26ms
    └─network-online.target @1min 6.836s
      └─NetworkManager-wait-online.service @58.305s +8.529s
        └─NetworkManager.service @48.794s +9.507s
          └─dbus.service @48.775s
            └─basic.target @48.690s
              └─sockets.target @48.690s
                └─snapd.socket @48.620s +69ms
                  └─sysinit.target @48.618s
                    └─systemd-timesyncd.service @48.458s +159ms
                      └─systemd-tmpfiles-setup.service @47.215s +1.185s
                        └─systemd-journal-flush.service @5.764s +41.448s
                          └─systemd-remount-fs.service @4.325s +1.438s
                            └─systemd-journald.socket @4.229s
                              └─system.slice @4.229s
                                └─-.slice @4.170s

Saw this post Can we talk about the boot time on Ubuntu 18.04?

Ran

$ systemd-analyze time
Startup finished in 4.907s (kernel) + 7min 8.181s (userspace) = 7min 13.089s
graphical.target reached after 1min 6.870s in userspace

Ran

$ service --status-all | grep '+' | wc -l
27
1

1. Journal size limit

The time consuming systemd-journal-flush.service can be tweaked by a journal size limit.
Edit the Journal config file

sudo nano /etc/systemd/journald.conf

# uncomment and configure the value
SystemMaxUse=50M
# personnaly i use 2M ;)

# Then restart the journald service
sudo systemctl restart systemd-journald

1.1 Journal clean up

sudo journalctl --rotate
sudo journalctl --vacuum-time=1s

For information, the journal size is given by this command:

journalctl --disk-usage

2. Startup applications

Another step to speed up userspace load delay is to disable some startup applications
See how to show all of them : https://help.ubuntu.com/community/ShowHiddenStartupApplications

sudo sed -i "s/NoDisplay=true/NoDisplay=false/g" /etc/xdg/autostart/*.desktop 

See how to open the Startup Applications applet : https://help.ubuntu.com/stable/ubuntu-help/startup-applications.html

 gnome-session-properties

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