Most administrators need to know the use of the Linux terminal although with the large number of existing commands it is almost impossible to learn them all, that is why in this post we will list the most used
The ping command will send an ICMP packet to the destination host, its main objective is to verify that one host is accessible from another
ping host
This utility is based on the TCP protocol which will make a query to the database in which the registrant information of a domain is found.
whois domain
Dig will perform a DNS query for information such as MX, A, Cname records, etc.
Mudig domain
Too similar to ping since it also sends an ICMP / UDP packet even though it faces collecting the hops (host) that the packet had to go through to reach its destination.
traceroute
nmap will allow you to scan open ports of some host
As such, this utility is not integrated by default in most systems so you must install it manually, knowing how to use it is like having a bazooka in your hands.
nmap host
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