Here’s how you can install and configure MariaDB Galera as a master-to-master replication cluster on Ubuntu 16.04 LTS: Install MariaDB on each node in the cluster: sudo apt-get update sudo apt-get install software-properties-common sudo apt-key adv –recv-keys –keyserver hkp://keyserver.ubuntu.com:80 0xF1656F24C74CD1D8 sudo add-apt-repository ‘deb [arch=amd64,i386,ppc64el] http://ftp.igh.cnrs.fr/pub/mariadb/repo/10.3/ubuntu xenial main’ sudo apt-get update sudo apt-get install mariadb-server mariadb-client … Read more

To enable TLS/SSL encryption with a GlusterFS storage cluster on Linux, you need to follow these steps: Generate a private key and a certificate signing request (CSR) for the GlusterFS server. You can use the openssl command line tool for this: openssl req -new -newkey rsa:2048 -nodes -keyout server.key -out server.csr Submit the CSR to … Read more

You can extract the contents of a .deb package file without opening it on Debian or Ubuntu Linux using the dpkg-deb command line tool. The following command will extract the contents of a .deb package file named package.deb to the directory extracted_files: dpkg-deb -R package.deb extracted_files The -R option tells dpkg-deb to extract the contents … Read more

To remove or delete a Personal Package Archive (PPA) on Ubuntu Linux, you can use the following apt-get command: sudo add-apt-repository –remove ppa:<PPA_name> Replace <PPA_name> with the actual name of the PPA you want to remove. For example, to remove the ppa:webupd8team/java PPA, you would run the following command: sudo add-apt-repository –remove ppa:webupd8team/java After removing … Read more

Bash command autocomplete can be enabled on Alpine Linux by installing the bash-completion package and adding the following line to the ~/.bashrc file: if [ -f /usr/share/bash-completion/bash_completion ]; then . /usr/share/bash-completion/bash_completion fi Here are the steps to follow: Update the package list: apk update Install the bash-completion package: apk add bash-completion Add the above line … Read more

You can retrieve the Common Name (CN) from an SSL certificate using the openssl command line tool. The following command will extract the CN from a certificate file cert.pem: openssl x509 -noout -subject -in cert.pem | awk -F= ‘/CN=/ {print $2}’ The x509 option is used to specify the X.509 certificate format, and the -noout … Read more

To check the version of Amazon Linux installed on an EC2 instance, you can use the following command in the terminal: cat /etc/os-release This will display the version information, including the version number, in the output. For example: NAME=”Amazon Linux” VERSION=”2″ ID=”amzn” ID_LIKE=”centos rhel fedora” VERSION_ID=”2″ PRETTY_NAME=”Amazon Linux 2″ ANSI_COLOR=”0;33″ CPE_NAME=”cpe:2.3:o:amazon:amazon_linux:2″ HOME_URL=”https://amazonlinux.com/”

To delete files in Ubuntu Linux, you can use the rm command in the terminal. Here are some examples of how to use the rm command: To delete a single file: rm file.txt To delete multiple files: rm file1.txt file2.txt file3.txt To delete a directory and all of its contents: rm -r directory Note: Be … Read more

To install and configure Jails on FreeNAS Corral 10, follow these steps: Go to the FreeNAS web interface and log in. Go to the “Jails” section in the left menu. Click the “Add Jail” button. Enter a name for the Jail and select the jail type. For FreeNAS Corral 10, the jail type is “Traditional”. … Read more

To enable and set up the slow query log in MariaDB, you need to modify the configuration file my.cnf and restart the MariaDB service. Here are the steps to enable the slow query log in MariaDB: Open the my.cnf configuration file: sudo nano /etc/my.cnf Add the following lines to the configuration file: [mysqld] slow_query_log = … Read more