The everlastingly useful grep command can change its character with the flip of a switch to help you find things. The grep command – likely one of the first ten commands that every Unix user comes to ...

In the example below, we can see how grep selects from a list of bugs all those that start with “bee” and then all those for which the third letter is an “a”. This is pretty basic when it comes to ...

I've used command lines at the prompt, but I never, ever trust someone who makes a big show of typing them from memory. For every time they get it right, they screw something up in their pointless ...