Ansible Vault allows you to encrypt sensitive data such as passwords, certificates, and keys, so that they can be stored safely in version control. To set a sudo password for Ansible Vault, you need to use the ansible-vault command as follows: Create an encrypted file: ansible-vault create secret.yml Enter a password for the vault. Enter … Read more

To install KVM on a headless CentOS 7 / RHEL 7 server, follow these steps: Verify Hardware: Check if your hardware supports virtualization. Run the following command to check: egrep -c ‘(vmx|svm)’ /proc/cpuinfo If the output is greater than 0, your hardware supports virtualization. Install KVM and QEMU: sudo yum install qemu-kvm qemu-img virt-manager libvirt … Read more

To add a network bridge using the nmcli command-line tool with the NetworkManager service in Linux, follow these steps: Install the NetworkManager command line tool: sudo yum install NetworkManager-cli or sudo apt-get install NetworkManager-cli Create a bridge interface: sudo nmcli connection add type bridge ifname <bridge_interface_name> con-name <connection_name> Replace <bridge_interface_name> with a unique name for … Read more

You can redirect standard error (stderr) in bash to a file, or to another standard stream, such as standard output (stdout), using the following syntax: command 2> file.txt This will redirect the standard error stream from the “command” to the file “file.txt”. To redirect standard error to standard output, which can then be redirected to … Read more

To disable bash shell history in Linux, you can use the following steps: Open the bash shell profile file: $ nano ~/.bash_profile Add the following line to the end of the file: unset HISTFILE Save and close the file. Log out and log back in, or open a new terminal window to apply the changes. … Read more

To access Python help in Vim, you can use the following steps: Start Vim and open a Python file or just enter normal mode by pressing the “Esc” key. Type :help pydoc to access the built-in help for Python in Vim. To view the help for a specific module or function, enter the command :!pydoc … Read more

To build a Perl module RPM file using cpanspec on RHEL/CentOS Linux, you can follow the steps below: Install cpanspec: # yum install cpanspec Download the Perl module from CPAN: # cpan <Module-Name> Convert the Perl module to an RPM package: # cpanspec <Module-Name> Build the RPM package: # rpmbuild –define “_sourcedir `pwd`” –define “_srcrpmdir … Read more

To reload the .vimrc file without restarting Vim on Linux/Unix, you can use the :source command. The syntax is as follows: bashCopy code :source ~/.vimrc This command will read the .vimrc file again and apply any changes you have made. The ~/ specifies the home directory of the current user. If your .vimrc file is … Read more

There are several ways to install Skype on Linux, including the following: Install using Snap: You can install Skype on Linux using the Snap package manager. To do this, follow these steps: sudo snap install skype –classic Install using Flathub: Flathub is another package manager for Linux, and it provides a Skype package. To install … Read more

To install wget on RHEL 8 using yum/dnf command, follow these steps: Open a terminal or SSH into your RHEL 8 system Update the package lists: dnf update Install wget using dnf command: dnf install wget This will install wget on your RHEL 8 system using dnf command. Once the installation is complete, you can … Read more