In /etc/ntp.conf would I like to change all servers to just
server ntp.example.com
in just one command line.
I can do it with ssh like so
augtool --autosave --noautoload --transform "ssh incl /etc/ssh/ssh_config" set "/files/etc/ssh/ssh_config/ServerAliveInterval" 60
Can something similar be done for server in /etc/ntp.conf?
Considering there are likely more than one server entries in your file originally, you need two commands to achieve this:
rm /files/etc/ntp.conf/server
set /files/etc/ntp.conf/server ntp.example.com
and augtool can only take one command as a one-liner.
What you can do however is to use stdin for this, e.g.:
echo -e "rm /files/etc/ntp.conf/server\nset /files/etc/ntp.conf/server ntp.example.com" | augtool -sAt "Ntp incl /etc/ntp.conf"
