It runs multiple expressions. That is sed '/pattern1/d pattern2/d' is the same with sed '/pattern1/d; /pattern2/d' and sed -e '/pattern1/d' -e '/pa

It runs multiple expressions. That is sed '/pattern1/d pattern2/d' is the same with sed '/pattern1/d; /pattern2/d' and sed -e '/pattern1/d' -e '/pattern2/d' I believe those are portable across all `sed` implementations, and they at least work with GNU `sed --posix` and plan9port's sed.