September 2004
Intermediate to advanced
204 pages
5h 17m
German
Content preview from LINUX: kurz & gut
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Name
uniq [Optionen] [Dateien] — /usr/bincoreutilsstdin stdout - datei -- opt --help --version
Der Befehl uniq wirkt auf aufeinander
folgende, doppelt vorkommende Textzeilen. Wenn Sie die folgende
Datei haben:
$ cat datei a b b c b
dann würde uniq die zwei aufeinander
folgenden b's erkennen und entsprechend Ihrer Spezifikation
verarbeiten, aber nicht das dritte b.
$ uniq datei a b c b
uniq wird oft nach dem Sortieren einer
Datei verwendet:
$ sort datei | uniq a b c
In diesem Fall bleibt nur ein b übrig. Sie können doppelt vorkommende Zeilen auch nur zählen und nicht löschen:
$ sort meinedatei | uniq -c
1 a
3 b
1 cNützliche Optionen
| Zählt benachbarte doppelt vorkommende Zeilen. |
| Lässt Groß- und Kleinschreibung unberücksichtigt. |
| Gibt nur die einmal vorkommenden ... |
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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.
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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.