Edit files in place

• This -i '' was necessary on MacOs to avoid creating a greatings.txt.bak file as a backup

$ sed -i '' 's/hello/bonjour/' greetings.txt

xargs into vim

• Per this helpful answer , you can xargs into vim on macos x with xargs -o …

find . -name 'blahfile*py' |head -1 |xargs -o vim 

xargs to md5

This is nice too, quickly md5 files.

$ fd spark-wee
en/post/2021-01-23-spark-weekend.md
posts/2021-01-23-spark-weekend.md
$ 
$ fd spark-wee|xargs -o md5
MD5 (./en/post/2021-01-23-spark-weekend.md) = 5534f81599860e239340b41ffa5aee09
MD5 (./posts/2021-01-23-spark-weekend.md) = 5534f81599860e239340b41ffa5aee09