In SUSE Linux, you can install RPM (Red Hat Package Manager) files and packages using the zypper command. Here’s an example of how to install an RPM file: sudo zypper install package.rpm Where package.rpm is the name of the RPM file that you want to install. You can also install multiple RPM files at once … Read more
The tcpdump command can be used to verify if Keepalived IP failover is working as expected by capturing and analyzing network traffic. Here’s an example of how you can use tcpdump to verify Keepalived IP failover: Log in to one of the nodes in your Keepalived cluster. Run the following tcpdump command: tcpdump -i eth0 … Read more
In Unix-like systems, you can use a for loop to iterate through all of the files in a directory. Here’s an example of a simple bash shell script that loops through all of the files in the current directory: for file in *; do echo “$file” done In this example, the * wildcard matches all … Read more
An iSCSI initiator is a client that allows a system to access iSCSI-based storage devices over a network. In Ubuntu Linux, you can set up an iSCSI initiator using the open-iscsi package. Here’s an overview of the steps to set up an iSCSI initiator in Ubuntu Linux: Install the open-iscsi package: sudo apt-get update sudo … Read more
Static routing is a form of network routing that allows administrators to manually specify the path for network packets to take through a network. In OpenBSD, you can configure static routes using the route command. Here’s an example of how to add a static route in OpenBSD: Open a terminal window. Log in as root. … Read more
Setting up a serial console on OpenBSD is a straightforward process that involves configuring both the operating system and the serial device. Here are the steps to set up a serial console on OpenBSD: Connect the serial device to your OpenBSD system: Connect the serial device to the serial port on your OpenBSD system, and … Read more
There are several command-line tools available in Linux that allow you to monitor your laptop’s battery status and thermal temperature. Here are a few popular options: acpi: The Advanced Configuration and Power Interface (acpi) is a Linux command-line tool that provides information about your laptop’s battery status, including the current charge level, remaining time, and … Read more
There are a number of IP subnet calculators available for Linux, both in the form of command-line tools and graphical applications. Here are a few popular options: ipcalc: This is a simple command-line tool that you can use to calculate subnets and display the results in a clear and concise format. Simply type “ipcalc [IP … Read more
To check the health status of disks behind Adaptec RAID controllers in Linux, you can use the smartctl utility. Here’s how: Install the smartmontools package, if it’s not already installed, by running the following command: sudo apt-get install smartmontools (for Debian-based systems) or sudo yum install smartmontools (for Red Hat-based systems) Find the device file … Read more
To start a virtual machine using KVM at boot time, you can follow these steps: Install KVM and the required utilities, such as libvirt, virt-manager, and qemu-kvm. Create a virtual machine using virt-manager or the virsh command line utility. Make sure that the virtual machine is in the “running” state. Check the virtual machine’s XML … Read more