The “dnf” command is the package manager for Fedora Linux. If you are behind a proxy server, you can configure dnf to use the proxy by setting the http_proxy and https_proxy environment variables. Here’s how: Open a terminal window. Set the http_proxy and https_proxy environment variables to the URL of your proxy server, including the … Read more
Composer is a dependency manager for PHP, which helps you manage the packages and libraries required for your PHP projects. Here’s how to install Composer on Debian or Ubuntu Linux: Open a terminal window. Download the Composer installer script by running the following command: curl -sS https://getcomposer.org/installer | php Move the composer.phar file to a … Read more
To force Apache to show a HTTP-410 Gone status code, you need to add a custom error response in your Apache configuration file. Here’s how to do it: Open the Apache configuration file, usually located at “/etc/httpd/conf/httpd.conf” or “/etc/apache2/httpd.conf”, using a text editor as root or using sudo. Add the following line inside the VirtualHost … Read more
The “x86info” and “cpuid” commands are tools in Linux that allow you to read the CPUID information for each CPU in your system. Here’s how to use them: Using “x86info”: Open a terminal window. Run the following command to display information about your CPU using “x86info”: x86info -a This will show you a list of … Read more
The root password on an Alpine Linux system can be changed using the “passwd” command. Here’s how to do it: Open a terminal window. Log in as root or switch to the root user using the “su” command: su Run the following command to change the root password: passwd Follow the prompts to set the … Read more
The zone information for a given country in a Linux or Unix system can be found using the “tzselect” command. Here’s how to use it: Open a terminal window. Run the following command: tzselect Follow the prompts to select the country, and then select the appropriate city or time zone for that country. After making … Read more
The partition table on a Linux system can be backed up and restored using various tools and methods. Here’s one way to do it using the “sfdisk” command: To backup the partition table: Open a terminal and log in as root or with superuser privileges. Run the following command to backup the partition table of … Read more
“osxlockdown” is a third-party security tool that can be used to secure and lock down Apple OS X 10.11 (El Capitan) systems. It provides various options for securing and hardening the OS X operating system, such as disabling automatic login, limiting access to the terminal, and setting strict permissions for system files and directories. Here’s … Read more
To delete a single command from the history in a Linux/Unix Bash shell, you can use the “history” command to view the command history, and then use the “history -d” command to delete a specific command by its number. Here’s an example: View the command history using the “history” command: history Find the number of … Read more
To change the system’s hostname on HP-UX, you can use the “sam” command-line utility. The “sam” utility is the System Administration Manager, which provides a text-based interface for managing various system configurations, including the hostname. Here’s how you can change the hostname using the “sam” utility: Log in as the superuser (root) Open the “sam” … Read more