cut and tr — The Quiet Tools That Clean Up Everyone Else's Mess
grep finds things. cut and tr shape what you do with them.
Most practitioners pick these up by accident — copy a one-liner from somewhere, it works, move on. But understanding what cut and tr actually do changes how you build pipelines. You stop reaching for awk when cut is enough. You stop writing substitution logic by hand when tr handles it in seconds.
This article covers both tools from the ground up — what they do, every flag worth knowing, and how they show up in real security workflows.
Two Tools, One Job Between Them
Before diving in, it helps to understand what each tool is actually for:
cut — extracts specific columns or fields from structured text. If data has a consistent separator (colon, comma, tab, space), cut pulls out exactly the piece you want.
tr— translates, deletes, or squeezes individual characters. It does not understand fields...
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