The plain Ubuntu image that is often used with AWS is very under-configured. Here are a few things to change.
This is annoying... the default timezone is set to UTC.
sudo dpkg-reconfigure tzdata
There is no swap configured, so lets put it on SSD ephemeral driver. By default the ephemeral drive is mounted to /mnt. The commands below will create a 5 GiG swap drive on the ephemeral drive.
sudo dd if=/dev/zero of=/mnt/swapfile bs=1M count=5120
sudo chmod 600 /mnt/swapfile
sudo mkswap /mnt/swapfile
sudo swapon /mnt/swapfile
You might also want to add it to /etc/fstab
/mnt/swapfile swap swap defaults 0 0
Change the hostname, by default AWS assings an ugly looking hostname such as: ip-10-233-64-xxx.
sudo pico /etc/hostname
Remove the name add whatever you would like.
sudo pico /etc/hosts
Add this line: