Network configuration in Ubuntu 18.04 server is controlled by “netplan” utility now.
To configure the static ip address, edit the file "/etc/netplan/50-cloud-init.yaml" eg: addresses: [11.11.11.21/24]
save and run:
sudo netplan apply
ifconfig to check the changes.
Run the command locale - it should show your current locale.
Generate the locales for English singapore:
sudo locale-gen en_SG en_SG.UTF-8
May try regenerating the supported locale list by running: sudo dpkg-reconfigure locales
And update/change the current default locale:
sudo update-locale LANG=en_SG.UTF-8 LANGUAGE=en_SG.UTF-8 LC_ALL=en_SG.UTF-8
sudo dpkg-reconfigure tzdata
deb http://archive.ubuntu.com/ubuntu/ bionic main universe multiverse