1 2 3 4 5 6 7 8 9 10 11 12 13 14
post_install() { grep -Pq '^nrpe\s+' /etc/services || \ echo "nrpe 5666/tcp" >> /etc/services } post_upgrade() { post_install $1 } post_remove() { # remove the line added to /etc/services sed -e '/nrpe 5666\/tcp/d' \ -i /etc/services || true }