Rahul Sahu CentOS and Red Hat Enterprise Linux (RHEL) are two closely related operating systems. CentOS is a community-driven, free and open-source Linux distribution that is built from the same source code as RHEL, but without the branding and licensed components. RHEL is a commercial Linux distribution that is designed for enterprise environments and is backed by … Read more
To add a static route in CentOS, you can use the ip route add command. The syntax of the command is as follows: sudo ip route add destination_network/subnet_mask via gateway_ip Where: destination_network/subnet_mask: Specifies the destination network and subnet mask in CIDR notation (e.g., 192.168.1.0/24). via gateway_ip: Specifies the IP address of the gateway that should … Read more
To configure client SMTP authentication (also known as smarthost authentication) in Postfix, follow these steps: Install the sasl2-bin package if it’s not already installed: sudo apt-get install sasl2-bin Create a new file in /etc/postfix/sasl directory for the authentication credentials. For example: sudo nano /etc/postfix/sasl/sasl_passwd Add the following line to the file, replacing smtp.gmail.com with the … Read more
If you have multiple ISPs and want to use their respective SMTP servers for sending mail from your Postfix server, you can configure authentication for each ISP separately. Here’s how you can set up SMTP authentication for multiple ISPs in Postfix: Install the sasl2-bin package if it’s not already installed: sudo apt-get install sasl2-bin Create … Read more
To temporarily disable an alias in the Bash shell, you can use the \ (backslash) character before the command that the alias points to. This tells the shell to use the actual command instead of the alias. For example, let’s say you have an alias called ll that points to the ls -l command. If … Read more
To uninstall VMWare Server software on a Linux system, follow these steps: Open a terminal on your Linux system. Change to the directory where the VMware Server installer is located. This is typically the directory where you downloaded the installer. Run the VMware Server installer with the –uninstall-component option and specify the component that you … Read more
Authentication and authorization are two distinct concepts in computer security that are often used together to control access to resources. Although they are related, they serve different purposes. Authentication refers to the process of verifying the identity of a user or a system. This process is used to ensure that the person or entity accessing … Read more
To install the glib-devel package on CentOS, follow these steps: Open a terminal on your CentOS system. Use the yum package manager to search for the glib-devel package: sudo yum search glib-devel This will display a list of packages related to glib-devel. Make sure to choose the correct package based on your system’s architecture. Install … Read more
To install and configure SSH on CentOS, follow these steps: Install SSH server: Open a terminal and run the following command to install the SSH server: sudo yum install openssh-server Start the SSH service: After the installation is complete, start the SSH service by running the following command: sudo systemctl start sshd Enable SSH service … Read more
Solaris provides several features to help protect against buffer overflows, which are a common type of security vulnerability. Here are some of the key features: Stack protection: Solaris includes a technology called StackGuard, which is designed to prevent stack buffer overflows. StackGuard adds a random value (called a canary) to the stack frame of a … Read more