In the IT world, knowing the difference between cloud computing and virtualizations essential. However, at times, users might confuse both the terms and their meaning and functioning. According to Red Hat, cloud-based virtualization is a technology that allows you to create multiple simulated environments from a single physical hardware system. Quite often people think that… Read More

Today I want to talk about virtualization in a more theoretical sense in order that you understand what type of virtualization to choose depending upon your needs. There are two major virtualization technologies KVM and OpenVZ. And due to equal popularity of both, there is a continuous debate between KVM vs OpenVZ. Over the years,… Read More

When is the best time to migrate your websites to a more private and flexible environment of a Virtual Private Server from Shared Hosting? This is probably one of the most discussed topics over the web, primarily due to the fact that the overall volume of shared hosting users globally is very high and with… Read More

When restarting a VPS on your node, you will receive the error. The VPS won’t start from command prompt as well as GUI. Error: required UB parameter swappages not set This is because swappages are not set for that particular VPS. You will need to set it with command vzctl set VEID –swappages=100:100 –save Now,… Read More

The time you try login to the VPS from the node it shows error below. Unable to open pty: No such file or directory If you even try to access the VPS, via SSH, it will show error below PTY allocation request failed on channel 0 To fix this issue there are 2 alternatives. Use… Read More

Invalid kernel, or some kernel modules are not loaded Container start failed (try to check kernel messages, e.g. “dmesg | tail”) When restarting container/VPS, you will receive this error. The first thing you need to check is if vz service is functional OR not. To start, use command as below. /etc/init.d/vz start All the containers/VPS… Read More

Using CATALINA_BASE:   /usr/local/jakarta/tomcat Using CATALINA_HOME:   /usr/local/jakarta/tomcat Using CATALINA_TMPDIR: /usr/local/jakarta/tomcat/temp Using JRE_HOME:        /usr/local/jdk Using CLASSPATH:       /usr/local/jakarta/tomcat/bin/bootstrap.jar Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. You will receive error above the time you stop/start tomcat on linux cPanel servers. This is because the assigned… Read More