In a Linux or Unix shell script, you can get the current year using the date command. For example: current_year=$(date +%Y) The date command is used to print or set the system date and time, and the +%Y option specifies that the year in the format YYYY should be displayed. The output of the date … Read more
To install OpenSSH server on Debian Linux 9 (Stretch), 10 (Buster), or 11 (Bullseye), you can follow these steps: Update the package list by running the following command: sudo apt-get update Install the OpenSSH server package: sudo apt-get install openssh-server Check that the SSH service is running: sudo systemctl status ssh If the service is … Read more
To install TrueType fonts in Debian Linux for use with Xorg, you can follow these steps: Install the necessary package: sudo apt-get install ttf-mscorefonts-installer Copy the TrueType fonts you want to install to the font directory /usr/share/fonts/truetype/. Update the font cache by running the following command: sudo fc-cache -fv Restart the X server by logging … Read more
You can check the version of the Linux kernel that’s currently running on your Ubuntu system using the following command: uname -r The uname command provides information about the system and its environment, and the -r option specifically requests the release information, which is the version of the Linux kernel. You can also use the … Read more
Here are some common examples of the host command in Linux and Unix: To perform a simple DNS lookup for a hostname, you can run the following command: host example.com To perform a reverse DNS lookup for an IP address, you can run the following command: host 8.8.8.8 You can also specify the DNS server … Read more
The dig command in Linux and Unix is used to query the Domain Name System (DNS) to retrieve information about hostnames, IP addresses, and other DNS-related information. The dig command can be used to perform various types of DNS lookups, such as checking the A (address) record for a hostname, the MX (mail exchange) record … Read more
There are several ways to find memory usage information on a CentOS Linux system. Here are some common commands: free: This command displays the amount of free and used memory in the system, as well as the swap space usage. The output is in kilobytes: $ free -h The -h option displays the output in … Read more
The ip command is a versatile tool for managing and querying network interfaces and IP addresses on a Linux system. Here are some common examples of using the ip command: Display information about all network interfaces: $ ip addr show Display information about a specific network interface: $ ip addr show eth0 Replace eth0 with … Read more
You can restart the Iptables firewall on a CentOS Linux server by executing the following steps: Stop the Iptables firewall service: $ sudo service iptables stop Flush all current Iptables rules: $ sudo iptables -F Start the Iptables firewall service: $ sudo service iptables start Alternatively, you can restart the Iptables firewall service by executing … Read more
You can reload the Squid proxy server configuration without restarting the Squid daemon by sending a SIGHUP signal to the Squid process. This will cause Squid to reread its configuration file, squid.conf, and apply any changes. Here’s how to reload the Squid proxy server on a Linux system: Find the process ID (PID) of the … Read more