To patch and protect against the OpenSSL vulnerabilities (CVE-2015-0291 and CVE-2015-0204) discovered in March 2015, you need to update to a version of OpenSSL that includes fixes for these vulnerabilities. The specific steps for updating OpenSSL depend on the operating system you’re using and the package manager you have installed. Here are the general steps … Read more

To find if a package installed through APT on Debian/Ubuntu Linux includes a fix for a specific Common Vulnerabilities and Exposures (CVE) number, you can use the following steps: Update the package information database: sudo apt update Install the apt-show-versions package, which provides information about the installed versions of packages and the available upgrades: sudo … Read more

To automatically mount a Windows NTFS file system on Debian/Ubuntu Linux, follow these steps: Install the ntfs-3g package, which provides NTFS support for Linux: sudo apt-get update sudo apt-get install ntfs-3g Create a mount point for the NTFS file system, for example: sudo mkdir /mnt/ntfs Identify the device name for the NTFS file system, for … Read more

To enable ping access in a Docker container on RHEL/CentOS Linux 7, you can use the following steps: Start a new Docker container: docker run -it –name <container_name> <image_name> /bin/bash Install the iputils package inside the Docker container: yum install iputils -y Modify the firewall rules to allow ICMP (ping) traffic: firewall-cmd –permanent –zone=public –add-rich-rule=’rule … Read more

To block Internet Explorer browser access with Squid proxy server on a Linux/Unix server, follow these steps: Install Squid proxy server if it’s not already installed on your server. Open the Squid configuration file, usually located at “/etc/squid/squid.conf” using a text editor. Add the following lines to the end of the file: acl blocked_browser browser … Read more

To downgrade or rollback updates on CentOS/RHEL, you can use the following steps: Install the yum-plugin-versionlock package to enable yum to lock packages at a specific version: yum install yum-plugin-versionlock Lock the current version of a package by using the following command: yum versionlock [package_name] To downgrade a package, use the yum downgrade command along … Read more

To change the hostname of a CentOS/RHEL 7 system, you can use the following commands: # hostnamectl set-hostname newhostname Replace “newhostname” with the desired hostname for your system. In addition to changing the hostname, you may also need to edit the /etc/sysconfig/network file to set the hostname permanently: # nano /etc/sysconfig/network Update the line that … Read more

The OpenSSH Multiplexer is a feature of the OpenSSH client that allows multiple SSH connections to be multiplexed over a single network connection. This can reduce the overhead of creating and maintaining multiple connections, leading to faster and more efficient connections. To enable the OpenSSH Multiplexer, you need to edit the OpenSSH client configuration file, … Read more

To install Gnome Desktop on a CentOS/RHEL 7 system using the yum command, follow these steps: First, make sure you have a stable internet connection and update your system: # yum update Install the Gnome Desktop environment by running the following command: # yum groupinstall “GNOME Desktop” After the installation is complete, you can enable … Read more

The VENOM vulnerability (CVE-2015-3456) is a security vulnerability that affects some Linux and Unix virtualization systems, including QEMU and KVM. To protect your Linux server against this vulnerability, you need to patch your system and apply the necessary security updates. Here are the steps to patch and protect your Linux server against the VENOM vulnerability: … Read more