Error – mount unknown filesystem type ‘lvm2_member’ [Fix]
“Sometimes all bad things will happen at the same time” – I remembered this quote on a night when my...
Linux
Change PDF Metadata from Linux Command Line
PDF Metadata generally contains information about the PDF document – such as Title, Author, MIME type, creator, keyword, pdf version,...[Kubernetes]: failed to pull image registry.k8s.io/kube-apiserver:v1.27.1
While installing Kubernetes and configuring Kubernetes on the Master node, encountered the error “failed to pull image registry.k8s.io/kube-apiserver:v1.27.1”. Below is...No space left on device: Couldn’t create the rewrite-map mutex: Configuration Failed [Apache]
Since my webserver (apache) wasn’t responding, I restarted the apache service. Most of the time restarting works, this time it...[Dompdf] PHP Fatal error: Class DOMImplementation not found
After fixing undefined function mb_internal_encoding encountered an another error “Uncaught Error: Class DOMImplementation not found“. Below is the complete error:...[Dompdf]: Call to undefined function mb_internal_encoding()
Recently in one of my web development project, I tried to use Dompdf and encountered error “Call to undefined function...How to detect and analyse botnet malware running on Linux
Recently some of the virtual machines used for my developmental activities were attacked! The problem was that there was a...Install_requires must be a string or list of strings – Fix Qiskit Terra installation
Issue: I got this error – “error in qiskit-terra setup command: ‘install_requires’ must be a string or list of strings...How to shrink a qcow2 Windows VM image on Linux
Followed your article to create a Windows Image for OpenStack glance repository. After successfully booting of VM, found the size...[Linux]: How to Change Hostname on CentOS/RHEL – 7/8
My system administrator installed minimal CentOS server and forgotten to setup the hostname. Now it has localhost.localadmin. How would I...No such file or directory c++ Error [CentOS]
While installing pip packages through the requirements file on the minimal CentOS Stream 8 server with python v3.7, encountered the...How to configure Open vSwitch bridge for OpenStack
Followed the guide from server-world for installing the OpenStack Train version on the CentOS server. Configuring neutron services requires physical...Too many connections for neutron-db-manage [MySQL]
While finalizing the installation of neutron on controller node, the operation to populate the database failed with Too many connections...How to manually install higher version of PIP for Python v2.7
On my CentOS 7 minimal server installation, I installed python-pip using YUM. However, the version it has installed is 8.1.2...[CentOS 7]: Yum install python-pip | No package python-pip available
I am trying to install python-pip on CentOS 7 minimal server. However, I got the error No package python-pip available....[CentOS Stream 8]: Error: Unknown repo epel [Solved]
I was given a task to install OpenStack Yoga release on CentOS Stream 8 Server (minimal Server). I followed the...[CentOS Stream 8]: Unknown repo crb : [Solved]
While executing the below command, encountered the error “Unknown repo crb“. # dnf --enablerepo=centos-openstack-yoga,epel,crb -y install openstack-glance Error: Unknown repo:...Failed building wheel for qiskit-terra : Error [Fix]
Question: While installing Qiskit packages on CentOS 7, I ended up with an error: Failed building wheel for qiskit-terra. There...Play & Learn Quantum Computing using Qiskit Blocks
Quantum Computing is a rapidly emerging technology that relies on the laws of quantum mechanics to solve problems that are...The GPG keys listed for the “MySQL 8.0 Community Server” repository are already installed [Fix]
Well, I got this error message “The GPG keys listed for the MySQL 8.0 Community Server repository are already installed but...