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linux systems

Update Centos Linux

How do I update Centos Linux 5 software and apply security patches?
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Q. Does any Linux distribution support suspend or hibernate functionality?
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Linux Read CPU Temperature Sensor Chip Data

Q. How do I read CPU core temperature data from a shell prompt under Linux operating system? How do I monitor my cpu hardware?
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Q. I'd like to share iSCSI storage with our 3 node web server cluster. How can multiple systems access a single iSCSI LUN under Linux operating system? Can I connect multiple servers to a single iSCSI LUN?
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Understanding /etc/group File

Can you explain me the format of /etc/group user group file under Linux / UNIX operating systems?
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