Search text with grep

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• how to use
• comparison: ack, ag, git-grep, gnu grep and ripgrep
  • tl;dr do use ripgrep (rg) for recursive directory searches
  • install your distibution version, use musl static binary or compile from rust sources
• silver searcher
• agrep for approximate matching
• if very complicated matching needed, still consider perl
  find . -type f -print0 | xargs -0 perl -ne 'printf "%s: %s: %s\n", $ARGV, $., $_ if /complicated/'