Increase the swap partition size in CentOS

1. view the current Partition

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1. Free-m

2. Increase the swap size by about 2 GB.

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1. Dd if =/dev/zero of =/var/swap bs = 1024 count = 2048000

3. Set swap files

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1. Mkswap/var/swap

4. Activate now enable swap Partition

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1. Swapon/var/swap

5. Self-start running when adding a system boot

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1. Vi/etc/fstab

Add a row

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1. /Var/swap defaults 0 0

6. Reclaim swap space

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1. Swapoff/var/swap

7. Reclaim from the file system

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1. Rm/var/swap