August 2012
Intermediate to advanced
624 pages
17h 11m
Polish
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9.9. Wyszukiwanie plików o określonej treści
Problem
W jaki sposób można odnaleźć plik o określonej treści? Wiemy, że plik bardzo ważnego listu został zapisany z rozszerzeniem .txt i zawierał w treści słowo istotny.
Rozwiązanie
Jeśli plik listu jest zapisany w bieżącym katalogu, zadanie można wykonać za pomocą polecenia grep:
grep –i istotny *.txt
Dodanie opcji –i zapobiega rozróżnianiu małych i wielkich liter. Użycie przedstawionego polecenia może być niewystarczające, ale warto od niego zacząć. Oczywiście, jeśli jest prawdopodobne, że plik będzie zapisany w którymś z podkatalogów katalogu bieżącego, można poddać analizie również wszystkie pliki ze wszystkich podkatalogów:
grep –i istotny */*.txt
W praktyce jednak nie jest to najefektywniejsza metoda. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.