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| Thread | Thread Starter | Forum | Replies | Last Post |
| assitance with sed (repeating patterns) | metalwarrior | UNIX for Dummies Questions & Answers | 7 | 02-02-2008 01:14 AM |
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02-02-2008
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need assistance: sed and repeating patterns
hi,
I need to write a command with sed to find all the lines in a file that contain patterns of three or more characters that repeat once and put them inside perenthezes. I cannot tell sed what pattern to look for. it should find repeated patterns automatically. example: "firstpatternsecondpattern" would get "first(pattern)second(pattern)" or "1234512345" would get "(12345)(12345)" 
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02-02-2008
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nevermind.
I just figured it out.
sed 's/\(.*\{3,\}\)\(.*\)\(\1\)/(\1)\2(\3)/g' file Last edited by metalwarrior; 02-02-2008 at 01:13 AM.
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