n Linux, hidden files are files that begin with a dot (.) character. To remove hidden files in Linux, you can use the rm command with the -r flag to recursively remove the files and the -f flag to force removal. Here is an example command that removes all hidden files in the current directory: … Read more
To install and set up PostgreSQL on RHEL 8, you can follow these steps: Enable the PostgreSQL repository by running: sudo dnf install https://download.postgresql.org/pub/repos/yum/reporpms/EL-8-x86_64/pgdg-redhat-repo-latest.noarch.rpm Install the PostgreSQL server package by running: sudo dnf install postgresql12-server Initialize the database by running: sudo /usr/pgsql-12/bin/postgresql-12-setup initdb Start and enable the PostgreSQL service by running: sudo systemctl start postgresql-12 … Read more
Setting up a firewall using FirewallD on Red Hat Enterprise Linux 8 (RHEL 8) is a fairly straightforward process. Here’s an overview of the steps you’ll need to take: Start by installing FirewallD by running the following command: sudo dnf install firewalld Once the installation is complete, start the FirewallD service: sudo systemctl start firewalld … Read more
Installing and using Nginx on OpenSUSE Linux server is a fairly straightforward process. Here’s an overview of the steps you’ll need to take: Start by adding the Nginx repository to your system. You can do this by running the following command: sudo zypper addrepo -f http://download.opensuse.org/repositories/server:/http/openSUSE_Leap_15.2/server:http.repo Update the package list by running the following command: … Read more
Installing MariaDB on Red Hat Enterprise Linux 8 (RHEL 8) is a fairly straightforward process. Here’s an overview of the steps you’ll need to take: Start by adding the MariaDB repository to your system. You can do this by running the following command: sudo dnf config-manager –add-repo https://downloads.mariadb.com/MariaDB/mariadb_repo.cfg Install MariaDB by running the following command: … Read more
To update OpenSUSE Linux software and kernel using the command line, you can use the “zypper” command. First, update the package index by running: sudo zypper refresh Then, update all installed packages by running: sudo zypper update You can also update specific packages by specifying their names after the “update” command. To update the kernel, … Read more
You can define an SSH key per host using the ansible_ssh_private_key_file variable in Ansible. This variable allows you to specify a different private key file for each host or group of hosts. Here is an example of how you can use the ansible_ssh_private_key_file variable in your inventory file: [web-servers] web1 ansible_host=192.168.1.100 ansible_ssh_private_key_file=~/.ssh/web1.pem web2 ansible_host=192.168.1.101 ansible_ssh_private_key_file=~/.ssh/web2.pem … Read more
Setting up SSH keys on a Red Hat Enterprise Linux 8 (RHEL 8) system allows you to log in to a remote server without having to enter a password. Here is an overview of the steps to set up SSH keys on RHEL 8: Start by creating a new key pair on your local machine. … Read more
To upgrade Ubuntu 16.04 to 18.04 LTS using the command line interface (CLI), you can follow these steps: Make sure your system is fully updated by running the following command: sudo apt update && sudo apt upgrade Back up your system before you begin the upgrade process. This is important to ensure that you can … Read more
Memcached is a high-performance distributed memory caching system that can be used to speed up dynamic web applications by reducing the amount of time required to load data from a database. Here is an overview of the steps to install and configure Memcached on Ubuntu 18.04/20.04: Start by updating the package list: sudo apt update … Read more