August 2012
Intermediate to advanced
624 pages
17h 11m
Polish
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7.9. Wykorzystanie polecenia grep do wyszukiwania informacji w zarchiwizowanych plikach
Problem
Chcemy przeszukać grupę zarchiwizowanych plików. Czy trzeba je wcześniej rozpakować?
Rozwiązanie
Nie ma takiej potrzeby, jeśli w systemie są zainstalowane narzędzia zgrep, zcat lub gzcat.
Program zgrep jest pewną odmianą polecenia grep, które obejmuje swoim działaniem zarówno pliki skompresowane, jak i nieskompresowane (obsługiwane formaty kompresji zależą od systemu operacyjnego). Często znajduje zastosowanie w operacjach wyszukiwania komunikatów usługi syslog w systemie Linux. Mechanizm rotacji dzienników pozostawia bieżący plik nieskompresowany (można go więc wykorzystać), ale analiza dzienników archiwalnych wymaga zastosowania polecenia:
$ zgrep 'wyszukiwany ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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