[ Thanks to brett
neely for this link. ]
“Dear Lina,
My email server has been running for seven months and I desperately
need to upgrade it. While I’ve done my best to track all the
security fixes, I’m sure I’ve missed some. However, I’ve finally
decided I can wait no longer. I’m determined to install a new Linux
distribution version, but my conscience tells me to keep some
backups. What can I do in order to preserve my current setup in
case anything goes wrong?…”
“Dear Lina,
Occasionally, I find a lost+found directory in various places
in my file system. Each of these directories is always empty, but
shows a size that I’d expect from a file. Any clue how they got
there? Are they wasting my disk space or not?…“