How to create and delete swap partitions in vps

Next let's take a look at how to add and delete swap partitions in linux vps. I will use the Xen VPS to create swap partitions.

Root permission is required for all operations

1. Create a swap Partition
First, use fdisk-l to view hard disk partitions.

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Fdisk-l DefaultDisk/dev/sda: 21.5 GB, 21474836480 bytes 255 heads, 63 sectors/track, 2610 cylinders Units = cylinders of 16065*512 = 8225280 bytes Sector size (logical/physical): 512 bytes/512 bytes I/O size (minimum/optimal): 512 bytes/512 bytes Disk identifier: 0x00097743 Device Boot Start End Blocks Id System /Dev/sda1*1 2481 19922944 83 Linux

There is only one partition.

Create a new partition for swap switching.

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Fdisk/dev/sda [Root @ itnmg ~] # Fdisk/dev/sda WARNING: DOS-compatible mode is deprecated. It's stronugly recommended Switch off the mode (command 'C') and change display units Sectors (command 'U '). Command (m for help): m Command action A toggle a bootable flag B edit bsd disklabel C toggle the dos compatibility flag D delete a partition L list known partition types M print this menu displays the Help menu N add a new partition create a partition O create a new empty DOS partition table P print the partition table shows the partition table Q quit without saving changes does not save and exits S create a new empty Sun disklabel T change a partition's system id to change the partition type U change display/entry units V verify the partition table W write table to disk and exit save and exit X extra functionality (experts only) Command (m for help ):

What we commonly use is the ones marked in Chinese.

Enter n to create a new partition.

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DefaultCommand (m for help): n Command action E extended P primary partition (1-4)

Select create extended partition or primary partition. Here we select primary partition and enter p

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Defaultp Partition number (1-4 ):

Enter the Partition Number, 1-4. Because sda1 is available, enter 2

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DefaultPartition number (1-4): 2 First cylinder (2498-2610, default 2498 ):

Enter the start position. Do not change it here. Press enter.

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DefaultUsing default value 2498 Last cylinder, + cylinders or + size {K, M, G} (2498-2610, default 2610 ):

Input + 200 M, set to M.

At this time, there is no reverse return information. Enter p to view the partition information.

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Default Device Boot Start End Blocks Id System /Dev/sda1*1 2497 20056128 83 Linux /Dev/sda2 2498 2523 208845 83 Linux

A new partition has been created. Enter w to save and exit. After exiting, the partition will be reloaded.

Create a swap on the newly created Partition

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Mkswap/dev/sda2 Swapon-

Set the system to enable the swap file, edit the/etc/fstab file, and add the following content:

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/Dev/sda2 swap defaults 0 0

Free-m view results

2. Delete swap partitions

Disable swap Partition

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Swapoff-

Delete A swap Partition

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Fdisk/dev/sda

This operation is similar to the operation when adding a partition. You just need to delete the partition and enter d.

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Partition number (1-4 ):

Enter the Partition Number to delete, 2

Enter p to view the partition information. The partition has been deleted.

Enter w to save and exit.

Modify the/etc/fstab file and delete/dev/sda2 swap defaults 0 0 save

Note:

Install the VPS of the linux operating system and add swap partitions (only VPS using Xen virtual technology is supported. Currently, OpenVZ does not support adding swap ).