First Download Techsmith Screen Capture Codec From The Following Link and install it then use the video tutorial
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Video Tutorial 1: - Raid _Redundant Array Of Inexpensive Disks
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Video Tutorial 2: - Installing Kernel
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Video Tutorial 3: - Locking And Unlocking Terminals
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Video Tutorial 4: - Changing Lost Root Password
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Video Tutorial 5: - Lvm (Logical Volume Manager)
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Video Tutorial 6: - Using Help
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Video Tutorial 7: - Using Tar
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Tutorial 8: - Using Vi Editor
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Video Tutorial 9: - Vi Sudo
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Video Tutorial 10: - Using Chkconfig
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ที่เหลือจะทยอยมาครับ (อัพเดตล่าสุด 1 ต.ค. 2552)