Author: Ruwantha Nissanka

If I ask you how to send an email, what would you say? You will say go to gmail or yahoo mail and send the email. But, do you know that you can send emails using your Linux command line? Yes! you heard me right. We can do this by using the mail command. In other words, it is a simple email client that gives you the basic email facilities. Moreover, this will allow you to send and read emails in your inbox. In this guide, I will show you how to do that. Step 01 : Installation Firstly, you have install it by using the following command #sudo apt install mailutils Step 02: Sending a simple mail Run the following command to send a simple mail. Moreover, you can set the subject of the mail and the receiver’s address in the command #mail -s “<subject>” <Email_address> Once you hit enter, you will be asked to add the CC address and type in the message. After that, the mail command would send the message. Step 03 : Setting the message body You can also set the message body in just one line of command #mail -s “<subject>” <Email_address> <<< <message> Step 04 : Get the input from a file Similarly, you can direct the mail command to get the message from a file #mail -s “<subject>” <Email_address> < <location> Step...

The main use of nslookup is to help with any DNS issues you may have. You can use it to find the IP address of a host, find the domain name of an IP address, or find mail servers on a domain. This tool can be used in two modes. An interactive Non-interactive mode The Interactive mode is used to query DNS-Server about various domains and hosts. Non-Interactive mode is used to query about information of a domain or host. Interactive mode In nslookup command in Linux Example1: You can enter to the interactive mode by using the following command #nslookup If you only know the hostname of a host and you need to find the ip address of that host, type the hostname Example2: Similar to the previous command, you can type the ip address to find out the domain using reverse domain lookup Example3: You can set the DNS query type to NS to display the NS records only. >set type=ns ><URL> Example4: Query only Mail servers. To do that set the DNS query type to MX to display the MX records >set type=mx ><URL> The non-interactive mode in nslookup command The non-interactive mode is invoked by typing the nslookup command, followed by the name, domain or the IP address of the host/network to be looked up. Example 5: Run the following command to query SOA record #nslookup -type=soa <URL> Example6: You can enable Debug mode...