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This document is for a previous release of cPanel & WHM. To view our latest documentation, visit our Home page.

For cPanel & WHM 11.44


We recommend the following configuration choices when you install cPanel & WHM.

Recommended file system

When you install your operating system, we recommend that you use an ext filesystem (ext2ext3, or ext4).


If you use the ext4 filesystem, you must download and install the package mentioned in the Red Hat documentation.


We only develop and test cPanel & WHM on file systems that support flock. Some network file systems (for example, NFS) may require additional configuration in order to function properly.

Recommended partitions 

Partition NameSize

Grow to fill disk (40 GB recommended, 20 GB minimum) 


To host a greater number of accounts, allocate more disk space to this partition.
swapSee recommended swap space.

For some servers, additional partitions are beneficial. This is particularly true for servers with high email volume. The number of files that the operating system can access per partition is limited.


Advanced partition information is available in our Pre-Installation Options documentation. 


Recommended swap space

For CentOS 5

RAMMinimum swap space
4 GB or less2 GB
4 GB to 16 GB4 GB
16 GB to 64 GB8 GB
64 GB to 256 GB16 GB
256 GB to 512 GB32 GB




For CentOS 6

RAMMinimum swap space
2 GB or lessTwo times the amount of RAM on the server.
2 GB to 8 GBThe same as the amount of RAM on the server.
8 GB to 64 GBHalf the amount of RAM on the server.
64 GB or more4 GB