When archiving absolute paths like /home or /etc, tar will show a warning like this:
tar: Removing leading `/' from member names
This is often annoying as this behavior (removing / from paths inside the archive) is well-known and desired.
We don’t need to see a warning about this.
An elegant way of avoiding this is to use the -Coption to have tar change directory to / before archiving.
Example:
tar -cf home.tar -C / home