Update ipv4_static_interfaces.cfg

Linux_reinstall/Ubuntu/CloudInit/ipv4_static_interfaces.cfg

@@ -60,6 +60,13 @@ network:
         addresses: [ipDNS1, ipDNS2]
 
 # later commands
+# Replace ssh port, permit root user login by password, enable sshd service.
+# Disable kernel need to restart: https://askubuntu.com/questions/1349884/how-to-disable-pending-kernel-upgrade-message
+# Disable and remove snap permanently: https://sysin.org/blog/ubuntu-remove-snap/
+# Install some common components.
+# Rename netplan config file.
+# Configure fail2ban.
+# Delete cloud-init config file and disable it permanently after first execution.
 runcmd:
   - sed -ri 's/^#?Port.*/Port sshPORT/g' /etc/ssh/sshd_config
   - sed -ri 's/^#?PermitRootLogin.*/PermitRootLogin yes/g' /etc/ssh/sshd_config
@@ -68,7 +75,15 @@ runcmd:
   - /etc/init.d/ssh restart
   - sed -i 's/#$nrconf{restart} = '"'"'i'"'"';/$nrconf{restart} = '"'"'a'"'"';/g' /etc/needrestart/needrestart.conf
   - sed -i "s/#\$nrconf{kernelhints} = -1;/\$nrconf{kernelhints} = -1;/g" /etc/needrestart/needrestart.conf
-  - apt update
+  - snap remove lxd
+  - snap remove $(snap list | grep "core[0-9]" | head -n 1 | awk '{print $1}')
+  - snap remove snapd
+  - apt autoremove --purge snapd -y
+  - rm -rf /etc/apt/preferences.d/no-snapd.pref
+  - echo 'Package: snapd' > /etc/apt/preferences.d/no-snapd.pref
+  - echo 'Pin: release a=*' >> /etc/apt/preferences.d/no-snapd.pref
+  - echo 'Pin-Priority: -10' >> /etc/apt/preferences.d/no-snapd.pref
+  - apt update -y
   - apt install dnsutils fail2ban file lrzsz net-tools traceroute unzip vim wget xz-utils -y
   - sed -ri 's/set compatible/set nocompatible/g' /etc/vim/vimrc.tiny
   - sed -ri '/set nocompatible/a\set backspace=2' /etc/vim/vimrc.tiny