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Manually Increase the Ulimit on ClearOS 6

On large environments, an increase in the ulimit can increase the performance.


To see what your current ulimit is set to run the following:

ulimit -n

To temporarily set it higher, run:

ulimit -n 65536

The system will revert back to it's standard ulimit. To change it permanently, refer to the next section.


To tweak this environment variable, log in to ClearOS using SSH or from the console navigate to the command line.

Edit the following file:


Add the following lines at the end of the file:

* hard nofile 65536

content/en_us/kb_o_manually_increase_the_ulimit.txt · Last modified: 2016/07/20 09:00 by dloper