Fix PHP Error – It is not safe to rely on the system’s timezone settings
Do you see this error “It is not safe to rely on the system’s timezone settings” (PHP timezone setting error) ...
Linux
Apache2 configtest failed: Segmentation fault (core dumped) [Solved]
I have installed Apache2 and it was working fine. I had also installed PHP 7.1 and everything was working fine,...Count number of pattern matched in vim editor
Question: How to count number of pattern matched in vim editor? I know to search a pattern in vim, but is...wc command prints wrong output character count [Solved]
Question: Why does wc command prints wrong output character count when used with echo command in Linux? Below is the command...ImportError: No module named MySQLdb [Solved]
Question: My Python script failed with an error message “ImportError: No module named MySQLdb” while performing MySQL operation. Here’s the complete...How to Shorten Bash Prompt in Linux?
If you are working with a deep directory structure, then you might have noticed a lengthier bash prompt. This tutorial...quotaon: Quota format not supported in kernel : Ubuntu [Solved]
I was recently working with quota tool on Ubuntu and was trying to configure quota for / partition. After the configuration, when...Install and Configure User and Group Disk quota on Ubuntu and Debian
Most of the time, the user keeps all of his junk/unwanted files in his home directory and never bothers to...How to Fix “nova.compute.manager Stderr: u”qemu-img: Could not open”
All of a sudden, the Hypervisor Summary page in Horizon dashboard was not updating the usage stats of vCPUs, RAM...Write a Batch Script to Automate File Transfer Between Linux & Windows using WinSCP
Question: I have been running cron on a Linux server to take a backup of my website once in a...Fix FTP Passive Mode problem on OpenStack & EC2 VMs
Have you installed VSFTP in your OpenStack or Amazon EC2 VM and getting errors such as “Entering passive mode…connection failed“?...How to Allow SFTP and disallow SSH?
In this tutorial, I will explain how to configure SSH to allow SFTP and disallow SSH login access. Solution: Well, SFTP...Install PHP 7 on a fresh Ubuntu VPS: [Fix] Unable to locate package PHP
Recently one of my client provided a fresh VPS and asked me to install PHP 7, Apache and MySQL. While...COMODO SSL Certificate Installation : Nginx
COMODO SSL Certificate Installation – I installed LEMP stack for one of my client on his CentOS 7 machine and...Call to undefined function simplexml_load_file() – PHP Error [Solved]
While working on a migration of a Joomla powered website on to a new VPS with PHP version 7.0 and...StartSSL Distrusted (Terminated), Migrate to LetsEncrypt!
TRUST is the word that comes to our mind when we speak about Certificate Authority. StartSSL, a certificate authority that provides free SSL...Understanding Affinity/Anti-Affinity Group Policies in OpenStack Mitaka
Nova service controls where the instances are started within OpenStack cloud environment. It means, the nova-scheduler decides which hypervisor will...Ctrl+S freezes Vi Editor & Unix terminal/PuTTY? Here’s how you can resume it!
Working on a Unix terminal and all of a sudden the terminal freezes after pressing Ctrl+S? Well, did you see the...How to update GPG key for MySQL APT repository on Debian/Ubuntu?
If you are getting an error “GPG error and Duplicate sources.list” while configuring MySQL repository for installing MySQL server version...How to fix Call to undefined function apc_fetch() – PHP Fatal Error [Solved]
I have been migrating one of the Joomla website and was stuck with a “PHP fatal error Uncaught Error: Call to...