Tomster/Linux-Setup-Scripts
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Update Ubuntu-Desktop-20.04-LTS.sh

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Ubuntu-Desktop-20.04-LTS.sh
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@ -6,6 +6,8 @@
#Note: BTRFS Setup is not included in this script. I highly recommend using encrypted ZFS instead: https://linsomniac.gitlab.io/post/2020-04-09-ubuntu-2004-encrypted-zfs/
#I also took some codes from https://www.ncsc.gov.uk/collection/end-user-device-security/platform-specific-guidance/ubuntu-18-04-lts as well
#Written by yours truly, Tomster
#Variables
@ -25,10 +27,16 @@ sudo sed -ie '/^DIR_MODE=/ s/=[0-9]*\+/=0700/' /etc/adduser.conf
sudo sed -ie '/^UMASK\s\+/ s/022/077/' /etc/login.defs
echo "umask 077" | sudo tee --append /etc/profile
#Disable shell access for new users
sudo sed -ie '/^SHELL=/ s/=.*\+/=\/usr\/sbin\/nologin/' /etc/default/useradd
sudo sed -ie '/^DSHELL=/ s/=.*\+/=\/usr\/sbin\/nologin/' /etc/adduser.conf
#Prevent normal users from accessing su
sudo dpkg-statoverride --update --add root adm 4750 /bin/su
#Remove unnecessary permissions
sudo chmod o-w /var/cache
sudo chmod o-w /var/metrics
sudo chmod o-w /var/tmp
#Make home directory private
sudo chmod 700 /home/*
@ -64,7 +72,7 @@ sudo fwupdmgr update -y
#Remove unneeded packages
#Note that I remove unattended upgrades because GNOME Software will be handling auto updates
sudo apt purge gnome-calculator *evince* *seahorse* *gedit* *yelp* gnome-screenshot gnome-power-manager eog gnome-logs gnome-characters gnome-shell-extension-desktop-icons gnome-font-viewer *file-roller* cups* printer-driver* network-manager-pptp* network-manager-openvpn* *nfs* apport* telnet *spice* tcpdump firefox* gnome-disk* gnome-initial-setup ubuntu-report popularity-contest whoopsie speech-dispatcher modemmanager avahi* gnome-shell-extension-ubuntu-dock mobile-broadband-provider-info ImageMagick* adcli libreoffice* ntfs* xfs* tracker* thermald sane* simple-scan *hangul* unattended-upgrades -y
sudo apt purge gnome-calculator *evince* *seahorse* *gedit* *yelp* gnome-screenshot gnome-power-manager eog gnome-logs gnome-characters gnome-shell-extension-desktop-icons gnome-font-viewer *file-roller* cups* printer-driver* network-manager-pptp* network-manager-openvpn* *nfs* apport* telnet *spice* tcpdump firefox* gnome-disk* gnome-initial-setup ubuntu-report popularity-contest whoopsie speech-dispatcher modemmanager avahi* gnome-shell-extension-ubuntu-dock mobile-broadband-provider-info ImageMagick* adcli libreoffice* ntfs* xfs* tracker* thermald sane* simple-scan *hangul* unattended-upgrades bluez* network-manager-config-connectivity-ubuntu -y
sudo apt autoremove -y
sudo snap remove snap-store
@ -75,7 +83,7 @@ sudo apt upgrade -y
sudo apt -y install neofetch gnome-software flatpak gnome-software-plugin-flatpak firejail apparmor-profiles apparmor-profiles-extra apparmor-utils gnome-tweak-tool git-core gnome-session-wayland libpam-pwquality python3-pip curl arc-theme nautilus
#Put all AppArmor profiles into enforcing mode
sudo aa-enforce /etc/apparmor. d/*
sudo aa-enforce /etc/apparmor.d/*
#Install Yubico Stuff
sudo apt -y install libpam-u2f