Configure the resolver to query DNS server 192.0.2.53 through /etc/resolv.conf.
Which line is appropriate?
resolv.conf uses nameserver followed by an IPv4 or IPv6 DNS server address.
Detailed explanation
nameserver 192.0.2.53Correct. nameserver specifies the DNS resolver address.
server=192.0.2.53Incorrect. server= is not the resolv.conf directive.
search 192.0.2.53Incorrect. search lists domain suffixes.
hosts 192.0.2.53Incorrect. hosts is not a resolver-server directive.
Try it yourself
An example you can run in a temporary verification environment.
printf '%s
' 'nameserver 192.0.2.53' | cut -d' ' -f1,2Expected result
nameserver 192.0.2.53Key points
- nameserver directive
- IP address
- Different from search
Notes
- Environment: POSIX awkによるdirective確認
- Command output formatting can vary slightly by distribution or tool version.
- Run the example in a temporary directory or process when possible.
Foundation review
Read the scope first
Check whether the command acts on the current shell, a new process, an existing process, or a file.
Verify the observable result
Use the supplied command and compare the output with the expected result.