Pre-Requisites: How to install GNU/Linux, Familiarity with Command Line, disk partitioning with logical volume manager, authenticating with ssh keys
Server basics (we will teach you): switching users (sudo, su), ssh key based authentication (scp, rsync, custom ssh port, mosh), software raid, encrypted partitions (using virtual machines), firewall with ufw, postgresql replication, lxc container (setup services on your local machine), sharing passwords with gpg encrypted files, nginx basic, screen/tmux/nohup, symbolic links (ln -s), locales, environment variables
Switching users
sudo or su commands can be used to run commands as different users. `sudo -u <username>` for running as different user. `su - postgres` can give you a shell as postgres user.
Symbolic links
Symbolic links can be used to store data in data partition without changing configuration files. For example /var/lib/postgresql can be a symbolic link to /data/postgresql where /data is a dedicated partition for storing data.
Setup correct Locales
`dpkg-reconfigure locales`