Tried do this on a mac. I had to replace gnu grep with perl: perl -wnle '/(.{0}https://assets.amuniversal.com.{0,33})/ and print $1' I had to replace wget w

Tried do this on a mac. I had to replace gnu grep with perl: perl -wnle '/(.{0}https://assets.amuniversal.com.{0,33})/ and print $1' I had to replace wget with curl: curl -s https://www.gocomics.com/calvinandhobbesespanol/$x -o $z-es; Then I realized I need gnu date, which had to come as part of coreutils: brew install coreutils So date becomes gdate for i in {1..1000}; do x=$(gdate +'%Y/%m/%d' -d "$i days ago"); z=$(gdate +'%Y-%m-%d' -d "$i days ago"); Hope I din't break other stuff with that. Now it still doesn't work, but I'm giving up, hopefully I saved a little time for somebody...