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Foundation and Earth
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Python for Unix and Linux System Administration
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The GNU Make Book
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The Linux Programming Interface
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Absolute FreeBSD: The Complete Guide to FreeBSD, 2nd Edition
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Linux Bible
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UNIX and Linux System Administration Handbook 4th edition
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Unix and Linux System Administration Handbook 5th Edition
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Bash Pocket Reference
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Advanced Programming in the UNIX Environment
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How Linux Works: What Every Superuser Should Know
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