How to fix: Warning: fd limit (ulimit -n) is lower than required under max. load

This happened on a recent cPanel server. Dovecot was showing this error message while restarting the service: Starting Dovecot Imap: Warning: fd limit (ulimit -n) is lower than required under max. load The fix was quick and easy. You just need to reconfigure dovecot and rise the file descriptor limits. Edit dovecot configuration file: nano -w /etc/sysconfig/dovecot Add this at the… Read more »

How to increase Swap size on CentOS + cPanel

Today you will learn how to increase Swap size on Linux systems, this applies to CentOS Linux and cPanel based servers. Sometimes our swap memory size is too small, and once your swap is totally consumed, you will face really slow speeds on your server because your RAM + Swap will be fully used. But hey, what’s Swap memory after… Read more »

How to Free up disk space on cPanel servers

Sometimes our servers include small hard drives or our users simply consume lot of disk space. In this situations when your drives are pretty close to be totally full, you may end up having writing error on partitions like /home /tmp or /boot. That’s why today we will teach you How to Free up disk space on cPanel servers. This tutorial is… Read more »

How to Repair eximstats on cPanel/WHM

Today you will learn how to repair eximstats on cPanel. Sometimes Eximstats, the cPanel daemon in charge of generate stats for email usage, stops working. In order to get your email stats working again, we will have to delete the current MySQL tables and re-create the stats again. How can I repair eximstats on cPanel? At the logs, you may… Read more »

How to rebuild Bind configuration on cPanel

Some times DNS servers on cPanel get corrupted, all the zones do not respond to queries or the service simply doesn’t start at all after restarting the Linux service. That’s when you have to rebuild Bind configuration on cPanel to get all the dns queries working again. How to Rebuild Bind configuration on cPanel In order to fix this corruption on the DNS… Read more »

Apache: Resource temporarily unavailable: setuid: unable to change to uid

Today we discovered a weird issue in one cPanel box, it was having a strange Apache error and it was crashing on and on. We checked the logs and found this error: Resource temporarily unavailable: setuid: unable to change to uid: [Tue Apr 27 10:01:03 2016] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 99 [Tue Apr 27 10:01:03 2016] [alert]… Read more »