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20-Mounting File Systems ( Linux +)
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20-File systems( Linux +)
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19-Disk Partitions( Linux +)
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18-Group Managemen( Linux +)
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18-User Managemen( Linux +) By Eng-Tarek Helall
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17-Manage Shared Libraries( Linux +) By Eng-Tarek Helall
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16-Software Installation Part 2 ( Manage Debian Packages) Linux +
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16-Software Installation Part 1 ( Manage Redhat Packages) Linux +
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15-System Shutdown (Linux +)
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14- Init Scripts (Linux +)
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13- Run Levels (Linux +)
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12-Boot Loaders (Linux +)