Most tutorials around show how to backup your Subversion repository:
svnadmin dump /path/to/your/repository > ./repository.dump
And how to restore it:
svnadmin create /new/path/to/your/repository
svnadmin load /new/path/to/your/repository < ./repository.dump
But don’t tell you what to do to solve the problem that will arise when you try to restore it:
svnadmin: Dump stream contains a malformed header (with no ':') at '* Dumped revision 0.'
The solution is too simple; just run:
grep --binary-files=text -v '^* Dumped revision' ./repository.dump > ./repository.clear-dump
Now you should be able to restore your subversion repository with no problems:
svnadmin load /new/path/to/your/repository < ./repository.clear-dump
PS: I don’t use hotcopy because I prefer to have a single file for these backups.