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Start all of your commands with a comma (2009)
Like many Unix users, I long ago created a ~/bin/ directory in my home directory and added it to my PATH so that I could supplement the wonderfully rich set of basic Unix commands with some conveniences and shell scripts of my own devising. The problem, of course, was the chance of collision.
But Debian today supports a huge number of commands; my modest Ubuntu laptop shows several thousand available: For me, “easy to type” means not having to use the shift key, and very few characters turned out to be available, unshifted, on a modern keyboard. Every tool and shell that lay in arm's reach treated the comma as a perfectly normal and unobjectionable character in a filename.
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