Ubuntu Linux

How do I find duplicate files in a given set of directories and delete them using a shell script or a command line options? How do I get rid of double duplicates files stored in ~/foo and /u2/foo directory?

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How do I check amount of RAM in my Ubuntu Linux laptop or desktop system/server using GUI and command line tools?

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How do I change Openssh welcome login message under Ubuntu Linux?

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How do I find out what kind of video card I have installed on my Ubuntu Linux desktop or laptop system?

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How do I compress and backup files using tar command to another directory on same computer or another Linux computer under Ubuntu Linux?

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I’ve root ssh access and need to add / delete a few IP address on fly using the IPtables command via local shell script. How do I add or delete an IP address remotely over the SSH session under CentOS / Redhat / RHEL / Debian / Ubuntu Linux?

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How do I add Autocomplete support to gedit text editor under Linux Gnome desktop operating systems?

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