8 my_size=${1:-$default_size}
11 fallocate -l "$my_size" /var/swapfile
13 # Only allow root to read it
14 # (this is not sufficient security for sensitive data)
15 chmod 0600 /var/swapfile
21 # Cause swap to be activated on boot
22 echo '/var/swapfile none swap sw 0 0' | tee -a /etc/fstab