Extending a swap LVM in Redhat 4 or 5

This refers to a pre-production box. Note, before you start, that swapoff is involved, and consider whether you want to do that to a busy box. :)

• lvscan
  
• lvextend --size +4G /dev/someVG/someVol
  
• lvscan
  
• free -m
  
• swapoff
  
• mkswap /dev/someVG/someVol
  
• swapon -va
  
• free -m