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Linux Crossword #2

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Across
4
Command for creating a new group
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Scrambling of data such that only those with the appropriate key can read the original text
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A command used to secure access to a file
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Process of transforming text into another string of text
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Verification that someone is who they say are
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Advanced Encryption Standard, abbrev'd
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Secured a server against attack; the server has been ________________
Down
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ext3 or ext4, for example
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Global regular expression print, as an abbrev
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GRUB or LILO
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The command used to get the file access control list
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Service running in the background
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Command used to add a user
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Command to modify a group
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Passwords are stored in the _____ file
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Command to display the list of filesystems
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______________ a password makes the password more difficult to crack by adding extra text before hashing