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

To change the hostname on a SUSE Linux system without using yast, you can use the following terminal commands: Open a terminal or SSH into your SUSE Linux system Backup the current /etc/HOSTNAME file: cp /etc/HOSTNAME /etc/HOSTNAME.bak Open the /etc/HOSTNAME file in a text editor: nano /etc/HOSTNAME Change the current hostname to the desired hostname: … Read more

You can print the filename using the FILENAME variable in awk. Here’s an example: awk ‘{ print FILENAME “: ” $0 }’ file1 file2 This command will print the content of file1 and file2, each line prefixed by the filename. You can also use the ARGV array to iterate over all the files passed as … Read more