Settings for Notebooks

Ubuntu 21.04

IdeaPad 5 15ALC05


  • Add driver for WiFi - Realtek 8852AE
    • Follow these instructions
  • Change security policy for WiFi by creating this file. Required because user credentials are not kept locally on the computer (LDAP authentication is used - NetworkManager can't handle that AFAIK)
    • cd /etc/polkit-1/localauthority/50-local.d
      vi 10-network-manager.pkla
      [Let all users modify system settings for network]
  • disable IPv6
    • vi /boot/firmware/cmdline.txt
    • Append "ipv6.disable=1" to the end of the line (no quotes)
    • Append (docker swarm hosts) "cgroup_memory=1 audit=1 cgroup_enable=memory swapaccount=1"
    • save and reboot

Install sssd to do centralised network LDAP user authentication

  • apt install sssd

Install autofs

  • apt install autofs
  • Adjust autofs.conf set
    mount_nfs_default_protocol = 4
  • Make autofs use files for its maps
    vi /etc/nsswitch.conf
    change automount: sss to
    automount: files

Purge systemd-resolved with help from this tweet:

  • How to take back control of /etc/resolv.conf on Linux via @CtrlBlog

    Yeah, Ubuntu's systemd-resolved defaults to 'compiled in',, all of which are profiling ur dns requests. Needless to say that bypasses PiHole. So block that egress.

Uninstall baloo indexer (confirmed on 22.04)

balooctl disable

for baloo in `dpkg --list 'baloo-kf5*' 'libkf5baloo5*' 'libkf5balooengine5*' 'libkf5baloowidgets-bin*' 'libkf5baloowidgets-data*' 'libkf5baloowidgets5*' | sed -n -E '/^ii/s/^ii[\t ]+([^\t :]+).*/\1/p'`
 do echo $baloo
 sudo snap remove $baloo
 sudo dpkg --ignore-depends=$baloo --purge $baloo
Note: Dolphin may refuse to load after this as there will be missing library files.