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Archive of posts filed under the faq category.

“Range of fields” in awk

This is asked very often, and the solution isn't always obvious (if at all).

Pulling out strings

Some ways to "pull out" strings from files

Replace every Nth occurrence

Problem statement: replace every Nth occurrence of a pattern. For bonus points, provide context to the match. For this article, we're going to use this example (mostly nonsensical, but that illustrates the concept): 1foo1 bar foo 2foo3 abc def foo foo foo 1foo4 foo foo 3foo9 4foo7 zzz 7foo7 3foo3 And we want, among all […]

Text replacement in context/out of context

An added twist to the usual search/replace problems.

Look for multiple patterns in files

One of the most FAQ of all times.