If a low-level backup is required then use these instructions. Rolling release If your Linux distribution has a rolling release model (e.g. Gentoo Linux) then you'll probably have to install it only once. With a non-rolling release distribution you'll have to do a system upgrade every now and then. Either way, the OS …

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The KDE desktop environment supports environment variables. These are active when logged in to KDE. Contrary to regular bash environment variables, which are active only when a bash shell is started. To set KDE environment variables create a file in the .kde4/env or .kde/env directory, e.g. as follows: 1export …

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Ever wanted to combine several PDF-files into a single file? Under Linux a simple command can be used to accomplish this. Use the command given below: 1gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -dPDFSETTINGS=/prepress -sOutputFile=output.pdf input1.pdf input2.pdf (Note: this requires ghostscript to be installed.)

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Under Linux, you can use the isohybrid command to attempt to fix an ISO intended for a USB-stick, but that does not boot (because e.g. it expects a real DVD). Warning and disclaimer: do make sure that you make a copy of your image file first and execute the isohybrid command on the copy. The command to use is as …

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