Run Rsync Without Deleting Your Backup
One rsync flag can save you. Another can erase the wrong side.
rsync -avhn --delete ./source/ ./backup/
problem area
Dangerous Commands
Commands worth understanding before copying from the internet.
4 checked fixes
One-liners in this area
Inspect Permissions Before Changing Them
The permission fix was easy. Knowing what not to chmod was the hard part.
namei -l /var/www/example/index.html
Preview What Rsync Would Delete
`rsync --delete` is useful. It is also how people erase the wrong side.
rsync -avhn --delete ./source/ ./backup/ | grep '^deleting'
Print a Dry-Run Removal Script
The reviewable cleanup command is the one you print before you run.
find /lab/disk-inode-cleanup/var/tmp/uploads -xdev -type f -mtime +7 -printf 'rm -i -- %p\n'