netbsdnoob How can i simply put all those files in /etc again ?
This ought to do it (as root):
cd /var/backups/etc
for file in $(find . -name '*.current')
do cp -ipv "$file" /etc/"${file%.current}"
done
You'll get the latest versions of the backed-up files. If you want specific revisions, you'll have to use the RCS commands. Read the man-page for this.
Note that you won't get all files with this--only the ones the system considers important to back-up. To get the remaining files, you'll have to extract the etc set as @JuvenalUrbino suggested.
