Install Jenkins on Ubuntu
Jenkins is an open source automation server. It helps automate the parts of software development related to building, testing, and deploying, facilitating…
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Disable MySQL Replication on Slave
To disable MySQL Replication on the Slave server, first, edit MySQL configuration file, usually in /etc/mysql folder, remove entries like server-id =…
Install Tomcat on CentOS 7
Apache Tomcat is an open source implementation of the Java Servlet and Java Server Pages. To install Apache Tomcat on CentOS 7,…
How to change Node Exporter port
Node Exporter by default uses port 9100. You may need to use another port for Node Exporter if port 9100 is already…
top
top command is used to see current system resource usage To show the current process Top sorted by memory Delay 3 second…
ack show the matched files name only
ack is a command-line utility written in Perl for searching strings inside files. By default when you search, it shows you the…
Install .NET SDK on Ubuntu 20.04
Microsoft .NET SDK and Run time now available for Linux. To install .NET SDK and runtime on Ubuntu 20.04, follow the instructions…
Enable/Disable Nextcloud Maintenance Mode
Maintenance mode is useful when you are making changes to your nextcloud installation like a software upgrade. To enable maintenance mode, run…
Module php-imagick in this instance has no SVG support
On Ubuntu server running Nextcloud, I got the following warning in Nextcloud Module php-imagick in this instance has no SVG support. For…
NextCloud APCu not available for local cache
When trying to upgrade nextcloud, I get the following error www-data@mail:/www/nextcloud$ php7.3 occ upgrade An unhandled exception has been thrown: OC\HintException: [0]:…
chattr: Operation not supported while reading flags
When making a file immutable with chattr command, I get the following error The error was due to the file I was…
Checking NVMe Disk
You can use nvme-cli to check your NVMe disks. To install nvme-cli, run On Ubuntu/Debian sudo apt-get install -y nvme-cli On RHEL…