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About Ranok

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  1. More specifically, you can disable a users ability to login by changing the shell that they use to "/sbin/nologin". (IE. open the file "/etc/passwd", find your ftp user account, and change the last field to be "/sbin/nologin").
  2. You could use a binary search algorithm to find your key frame. It runs in O(lg n) time (ie. its fast even for large arrays). You can look here for an example.
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