in reply to how to search and replace some text in a .conf file

For a quick one-liner try this:

perl -i.old -pe 's|^(be_address =).*|$1 192.186.106.55|' svs.conf

In case this goes wrong, the previous version of the file is kept as svs.conf.old (that's the -i.old) - so no risk in trying.

In Section Seekers of Perl Wisdom