What does ETC hosts file contain?

What does ETC hosts file contain?

The /etc/hosts file contains the Internet Protocol (IP) host names and addresses for the local host and other hosts in the Internet network. This file is used to resolve a name into an address (that is, to translate a host name into its Internet address).

How do you find the hostname of an IP in Linux?

Another way to get the hostname is to user the nslookup command. Here the hostname is highlighted in the green color. The alias name for the hostname is highlighted in the red color. If you are connected the remote host, you can get the hostname of the remote machine by using the arp command.

What does hostname f do?

-f : This option is used to get the Fully Qualified Domain Name(FQDN). It contains short hostname and DNS domain name. -F : This option is used to set the hostname specified in a file. If the hostname has no period, the full hostname is displayed.

How to write / etc / hosts file in Linux?

The /etc/hosts file is an ordinary text file. Two types of lines are permitted: Lines may be intermingled as needed. Comments begin with a hash symbol ( #) and continue to the end of the line. For each host a single line should be present with the following information: IP_address canonical_hostname [aliases …]

Where is the hostname and IP address in / etc / hosts?

My another question: According to the /etc/hosts file, the hostname localhost should have been resolved to 192.168.10.10 instead of loopback IP address 127.0.0.1. Anybody can explain this to me? The host (and nslookup) utilities explicitly query DNS servers, and do not consult the /etc/hosts file in a default system configuration.

What are the lines in the hosts file?

The /etc/hosts file is an ordinary text file. Two types of lines are permitted: Empty Lines. Host name definitions. Lines may be intermingled as needed. Comments begin with a hash symbol ( #) and continue to the end of the line.

When to run hostname and IP address mapping in Linux?

In my linux machine, when I run hostname, it shows mongodb, but when I run host mongodb, it shows: