Instead, users are encouraged to make use of a tool by the name of ‘sudo’ to carry out system administrative duties. It merely has been given a password hash which matches no possible value, therefore may not log in directly by itself. This does not mean that the root account has been deleted or that it may not be accessed. Ubuntu developers made a conscientious decision to disable the administrative root account by default in all Ubuntu installations. Therefore, it is important that you understand how you can protect your server through simple and effective user account management techniques. Ineffective user and privilege management often lead many systems into being compromised. User management is a critical part of maintaining a secure system. The numbers show that your biggest worry is simply the heat death of the universe, not how fast your CPU is.Multi-node configuration with Docker-Composeĭistributed Replicated Block Device (DRBD)
It may be off by a order or three of magnitude - but that's irrelevant.
This is of course back of the napkin-math. When you're nearly finished, in around 10^19 years, you'll probably have some issues with the planning authorities - because the hard drives now equal the earth in mass, and lead to weird gravitational distortions.Ĩ3^20 is incidentally very close to 2^128, so pages such as this may be worth a read as well. You'd probably call Seagate or someone and ask for a good bulk rate at that point, of course, explaining that you plan to keep on purchasing at that rate for as long as they are able to deliver. Currently they cost around 250USD a piece, so just storing this (if hard drives were that fast.) would cost you in the neighbourhood of 450000USD - per day. So generating the 20-character strings, if you have extremely fast storage, able to swallow 20 billion bytes per second, it would still take 10^10 times longer than the current age of the universe.įor those 10^20 years, you're filling a 10TB hard drive every 8 minutes. And you haven't yet started your 19-character strings - which is not a trivial problem either.
If you create one billion (10^9) 20-character strings per second, you'll spend over 10^20 years generating the 20-character strings. That's about 2.5*10^38, or incidentally approximately 2^127.5. There's 83^20 20-character strings that can be formed from this. It's impossible as in physically impossible. Not impossible as in you have a too slow computer - that can be solved with money.
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