URL Redirect Tracer:
curl -sIL shorturl.at/dfIJQ | grep -i location
TIL about renameutils and this little trick in bash to
mvfiles without typing the full name twice:$ mv photo/2020/01/01/{IMG,img}0001.jpegSource: namsral
Show duplicate lines in a file:
sort <FILENAME> | uniq -c | grep -v '^ *1 '