Centos Add swap (swap partition)

In general, memory over the hour, you can increase the swap, the size of memory twice times appropriate, the specific settings are as follows:

1. Enter the catalogue
cd/var/

2. Get the block of swap files to add (here 1GB for example)
DD If=/dev/zero of=swapfile bs=1m count=1024

3. Create swap Files
/sbin/mkswap Swapfile

4. Activating swap Files
/sbin/swapon Swapfile

5. Check that the swap information is correct
/sbin/swapon–s

6. Add to the Fstab file to let the system boot automatically
echo "/var/swapfile swap swap defaults 0 0" >>/etc/fstab

7. View the memory situation
Free-m
You can see the relevant memory and swap situation, if the previous swap, then the above expansion, is based on the original overlay

Centos Add swap (swap partition)