To update all installed ports/applications on FreeBSD, you can use the portsnap and portmaster utilities. Follow these steps: Update your ports tree by running the following command as the superuser: # portsnap fetch update This command downloads the latest version of the ports tree to your system. Install portmaster if it is not already installed: … Read more

User dot-files are hidden files in a user’s home directory that start with a dot (e.g. .bashrc, .profile). To list these files for a particular user in Linux/Unix, you can use the following command: ls -a /home/username/.* Replace username with the actual username for the user whose dot-files you want to list. Alternatively, you can … Read more

To configure Apache to serve dual stacked IPv4 and IPv6 virtual hosts, you need to follow these steps: Make sure that your Apache installation supports IPv6. You can check this by running the following command: httpd -V | grep -i ipv6 If IPv6 support is enabled, you will see a line containing –enable-ipv6. Edit the … Read more

To configure disk quotas for a UFS file system in Solaris UNIX, you need to follow these steps: Enable quotas on the file system. Run the following command to enable quotas: sudo quotacheck -vum /path/to/filesystem This command will create quota files on the file system, which are used to track usage and limits for individual … Read more

To disable IPv6 networking on RedHat/CentOS, you need to modify the network configuration file. Here are the steps: Open the /etc/sysctl.conf file with a text editor: sudo vi /etc/sysctl.conf Add the following lines at the end of the file: net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 Save and close the file. To apply the changes, run … Read more

To test the graphical performance and 3D acceleration of your Linux/UNIX system, you can use the glxgears and glxinfo tools. These tools are typically installed as part of the graphics drivers package on your system. Here are the steps to test the graphical performance: Open a terminal window and run the following command to check … Read more

To configure the ip6tables firewall in CentOS/RHEL to allow IPv6 traffic, you can follow these steps: Check the current ip6tables rules by running the following command: sudo ip6tables -L -n This will display the current rules in the ip6tables firewall. Allow inbound and outbound traffic on the loopback interface by running the following commands: sudo … Read more

To add a trusted Certificate Authority (CA) to Firefox, you can follow these steps: First, obtain the root CA certificate from the organization or website you want to trust. This may be provided in a variety of formats, such as a .crt file or a URL. In Firefox, click on the “Menu” button (three horizontal … Read more

By default, the gedit text editor in Ubuntu or other Linux distributions may not have built-in support for Python or C++ code autocompletion. However, you can easily add this functionality by installing appropriate plugins. Here are the steps to add Python/C++ autocomplete support in gedit: Open a terminal window and run the following command to … Read more

Upgrading Perl on FreeBSD is a relatively straightforward process. Here are the steps to upgrade Perl 5.8.x to 5.10.x: Make sure your ports tree is up-to-date by running the following command: portsnap fetch update Remove the existing Perl installation: pkg_delete -f perl-5.8.* Install the new version of Perl from the ports collection: cd /usr/ports/lang/perl5.10 make … Read more