How to prevent Email blacklisting
Mails can bounce back with the message ” Your message is blocked for low reputation”, or similar. If you wonder: it is likely that your e-mail landed on an e-mail…
Working with MySQL-MariaDB Time Zones
For any program, whether it’s a web app, API server, desktop software, tablet or phone app, working with the time zones is a pretty common task. In this article, I…
How to disable LiteSpeed connection timeouts
LiteSpeed is the webserver we use on all our hosting servers instead of Apache. We set a LiteSpeed connection timeout to ensure users with potential scripting issues do not cause…
GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed
On centos 7, there are instances where you get the error Unable to register authentication agent: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Cannot determine user of subjectError registering authentication agent: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Cannot determine user of subject…
How to install OpenLiteSpeed web server in centos ?
Open LiteSpeed is an open source web server which comes with a lot of interesting features that helps us to manage our sites effectively. Some of the features include 1)…
Bad Magic Number In Superblock
Bad Magic Number In Superblock The Server will go down due to issues in disks attached. Sometimes fsck in disks ends up in an error “Bad magic number in Superblock while…
Linux RAID with mdadm Cheat Sheet
RAID Levels RAID 0 Stripes data evenly across two or more disks. RAID 1 Mirrors data on two or more disks. RAID 2 Rarely used, Bit-level striping with Hamming code…
How to resolve 502 Bad Gateway cwpsrv
If your VPS is running CentOS and you use Control Web Panel (CWP), you may get this error at one time or the other: 502 Bad Gateway cwpsrv For me, I…