Use pool.ntp.org in ntpd configuration and request iburst for faster initial synchronization.
Which ntp.conf line is appropriate?
The pool directive expands a DNS name into multiple time sources, while iburst sends initial probes at short intervals.
Detailed explanation
server=pool.ntp.org iburstIncorrect. ntp.conf does not use this equals form for server lines.
Incorrect. ntp.conf does not use this equals form for server lines.
nameserver pool.ntp.org iburstIncorrect. nameserver is a resolver configuration directive.
Incorrect. nameserver is a resolver configuration directive.
chronyc pool pool.ntp.org iburstIncorrect. This is a chronyc command rather than an ntp.conf line.
Incorrect. This is a chronyc command rather than an ntp.conf line.
pool pool.ntp.org iburstCorrect. It defines the pool and iburst option.
Correct. It defines the pool and iburst option.
Try it yourself
An example you can run in a temporary verification environment.
printf '%s
' 'pool pool.ntp.org iburst' | awk '{print $1, $2, $3}'Expected result
pool pool.ntp.org iburstKey points
- pool directive
- pool.ntp.org
- iburst speeds initial sync
Notes
- Environment: POSIX awk / 模擬設定のみ
- 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.