Category: Centos


Free Linux Online Training Courses

Free Linux Online Training Courses? Free Linux Courses. Free Courses. Free Linux Courses Handbook. Just like Windows and Mac OS X, Linux is an operating system. It’s been around for quite some time, and has since reached all users based on smartphones, homes, businesses, corporates, industries and continents. As worldwide […]

How to optimize server for wordpress website?

How to optimize server for wordpress website, server optimization? When google how to optimize server for wordpress, wordpress will explain that it is server optimization. However, if you are using shared hosting there will be no effect. So if you feel your wordpress site still slow after installing optimize images […]

The sender’s domain is not registered in Panel, or is misconfigured.#012REJECT

I have a Plesk 12.5 installation with CentOs 6.8 Server. All installations are up to date, but this actually broke my installation after the last Plesk auto upgrade. At the last Plesk upgrade, my server can no longer use sendmail to send email directly from the server. The errors I […]

[warn] mod_fcgid: process PID graceful kill fail, sending SIGKILL

This consider normal error if you are using PLESK. Nowadays, PLESK auto updating since version 12. ERROR: [warn] mod_fcgid: process PID graceful kill fail, sending SIGKILL [Fri Sep 1 18:09:41 2016] [warn] mod_fcgid: process 12525 graceful kill fail, sending SIGKILL [Fri Sep 1 18:09:57 2016] [warn] mod_fcgid: process 12538 graceful […]

How to add ethtool duplex settings to a network card

Changing your Network Interface Speed, Duplex or Auto Negotiate settings on Red Hat Linux, Fedora and Centos. To set the interface speed, duplex or auto negotiation on Linux system boot up (make settings permanent), you need edit /etc/sysconfig/network-scripts/ifcfg-eth0 file for eth0 interface. This file used by Red Hat enterprise Linux, […]

Kernel Panic /proc/sys/kernel/hung_task_timeout_secs blocked for more than 120 seconds

If you’ve run into the situation that your Linux box does not respond to ssh anymore and you want it to reboot, because some processes are taking away all the system resources, this article may be for you. Short description: This guide shows how to fix hung_task_timeout_secs and blocked for […]