sed -I extension - FreeBSD sed (continuous line-counter)
sed -I[extension] - NetBSD and Illumos sed (continuous line-counter)
sed -i extension - FreeBSD sed
sed -i[extension] - NetBSD, OpenBSD, Illumos, BusyBox and GNU sed
sed --in-place[=extension] - Illumos, BusyBox, and GNU sed
Parame...