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system configuration

Linux Create a Custom Gnome Login Desktop Screen

Q. I'd like to keep same login screen for my school Linux desktop system lab. How do I create a custom gnome login screen or menu under CentOS or Ubuntu Linux desktop systems?
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Linux Track NFS Directory / Disk I/O Stats

How do I track NFS (network filesystem) client metrics (disk I/O) on Linux operating system?
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What is UNIX / Linux C Shell?

What is C shell under UNIX / Linux operating systems?
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