Sure, using the Linux command line is optional. But these are commands I depend on every day. See what you think.

Once you’ve gained a solid understanding of Linux and mastered the various commands available, your next big win comes in the form of shell functions. Code wrapped in a function can be reused by your ...

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Quentin Fottrell is MarketWatch's Managing Editor-Advice Columns and The Moneyist columnist. You can follow him on Twitter @quantanamo.