Best way to disable swap in Linux

Identify configured swap devices and files with  cat /proc/swaps . 
 Turn off all swap devices and files with  swapoff -a . 
 Remove any matching reference found in  /etc/fstab . 
 Optional:  Destroy any swap devices or files found in step 1 to prevent their reuse. Due to your concerns about leaking sensitive information, you may wish to consider performing some sort of secure wipe.