Sometimes, it’s worth to encrypt swap space, especially if you process some privacy-sensitive data.
# install cryptsetup sudo apt-get install cryptsetup # generate swap sudo truncate -s 1GB /cryptswap sudo mkswap /cryptswap # add to /etc/crypttab cryptswap /cryptswap /dev/urandom swap # add to /etc/fstab /dev/mapper/cryptswap none swap sw 0 0 # activate encryption and swap sudo /etc/init.d/cryptdisks reload && sudo swapon -a
Inspired by AskUbuntu.