SWAP space under RHEL/CentOS


Adding a 250 MB swap file to the system

Create an empty 250M file : dd if=/dev/zero of=/swapfile bs=1024 count=256000

Create the swap on the newly created file : mkswap /swapfile

Enable the new swap file : swapon /swapfile

Edit fstab and add : /swapfile swap swap defaults 0 0

**Verify if the new swap space is enabled : ** cat /proc/swaps free -m

A good idea is to have your swap partition as an LVM volume.. So you can always resize it if your needs are growing.

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