Four days ago the news about the Heartbleed got every sysadmin's attention. Renowned security expert Bruce Schneier writes: > This means that anything in memory -- SSL private...

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I recently had an annoying encounter with the error message: Too many authentication failures for root. I found out this can be caused because you've hoarded too many SSH keys :)...

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If you want to do command-line MySQL administration like restoring databases or dumping statistics, you need the root account and it's password. Or do you?

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Sometimes when digging real deep into Windows like I recently had to, you need to have the Windows SID (Security Identifier) of a local user. I wasn't able to find any standard way...

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Let's say you want your local restricted users to be able to restart specific services. On linux you'd probably type visudo. In Windows I found, you have to dig a little deeper int...

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Deleting a file or reformatting a disk does not destroy your sensitive data. The data can easily be undeleted. That's a good thing if you accidentally throw something away, but wha...

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Making sure your system is up to date is a key attribute to it's security. Furthermore Ubuntu releases updates pretty often and you probably don't want to miss out on added stabili...

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Since 2005 there has been an immense increase in brute force SSH attacks and though Linux is pretty secure by default, it does not stop evil programs from indefinitely trying to lo...

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