Have you ever tried to quickly create USB Boot Disk in Linux and had no dedicated software to create one? For a long time Linux distributions have come with basic tools like dd utility out of the box. dd command […]
OpenStack Dashboard Error: Unable to get network agents info often seen in Horizon is a result of Neutron related problems. Usually the problem is caused by neutron-service failure due to service operation time outs. The below screenshot presents OpenStack Dashboard […]
OpenStack can use diffirent backend technologies for Cinder Volumes Service to create volumes for Instances running in cloud. The default and most common backend used for Cinder Service is LVM (Logical Volume Manager), but it has one basic disadventage – […]
Pretty often after rebooting Controller node or powering it on after shutdown, the Horizon (OpenStack Dashboard) is not responding, but we know that it worked before reboot. This issue may be caused by httpd service (Apache), which entered failed state […]
Few times during KVM based OpenStack (Mitaka, Newton) automated installations using packstack we encountered DB synchronization errors. It turned out, that these installation errors appeared due to slow network and/or poor hardware performance of KVM virtualized hardware used to build […]
The sudo command offers a mechanism for providing trusted users with administrative access to a system without sharing the password of the root user. A sudoer (regular user added to sudoers) once authenticated, can execute the administrative commands like they […]
Have you ever wondered how to find RPM package which contains particular script, application or command in your RedHat / CentOS or any other Yum / RPM based operating system? Have you ever needed to find the RPM package which […]
