Advanced unix and Sed

[Gammerdinger]

Care with sed on the Advanced Unix module. Macs come with BSD sed, but the lesson is for GNU sed. There is some functionality in the lesson that doesn't work in BSD sed which works in GNU sed. To install GNU sed on a Mac, you can install Homebrew:

https://brew.sh

Do the "Next Steps" which were like:

(echo; echo 'eval "$(/opt/homebrew/bin/brew shellenv)"') >> /Users/$USER/.bash_profile
eval "$(/opt/homebrew/bin/brew shellenv)"

Install GNU sed with the following command:

brew install gnu-sed

Then you should be able to call GNU sed with the gsed command.