xargs+grep+cut+sed for text replacement
To replace all occurrences of comments: 1 with comments: True in all the “html” files under the directory.
$ find . -type f -name "*.html" | xargs grep -i ^comments: | cut -d: -f 1 | xargs sed -i -e "s/comments: 1/comments: True/"
Print last change time of files
Print the UTC time and the name of the latest html file to be changed in the templates directory.
find templates -type f -name "*.html" |\
TZ="UTC" xargs ls -l --time-style=+%Y%m%d%H%M%S |\
awk '{print $6 " " $7}' | sort | tail -n 1