On 02/05/2010 Brice Goglin wrote: > Hello, > > I started encrypting my swap today. > I followed /usr/share/doc/cryptsetup/README.Debian.gz > but it didn't work. It hung at boot while creating the encrypted > device and I had to ctrl-c. Talking to some people and reading > some webpages, it seems to be caused by /dev/random not generating > enough entropy. And, as suggested in the README, changing to > /dev/urandom fixed the problem. > I think this should be explained much better in the README: > * say that it would hang (I didn't write the exact message but it may help) > * maybe say that touching the mouse/keyboard may generate entropy, > making it clear that it's an entropy problem?
hey brice, i changed the default example in README.Debian to /dev/urandom now, and adjusted the explanation accordingly: > That's it! You have a crypted swap device. Note that /dev/urandom provides > only pseudo-random entropy. So if you're paranoid rather use /dev/random as > source for random data. Be aware though that /dev/random might not provide > enough random bytes for your key, causing your system to hang at boot, waiting > for more entropy. Moving mouse and keyboard typing might help in this case. feel free to modify or exend this text. i'm not a native english speaker, and am happy about improvments and advices for the documentation i wrote. greetings, jonas
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