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On Mon, Nov 07, 2005 at 01:44:42AM -0200, Rafael Barreto wrote: |
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> Hi, |
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> |
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> I'm learning about the use of the sed command and I have some questions. I'm |
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> trying to read in /etc/conf.d/clock the CLOCK variable with: |
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> |
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> sed '/^CLOCK="*"$/p' /etc/conf.d/clock |
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> |
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> This command, in principe, must print in screen the line that contains |
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> CLOCK= in the begin, contains anything between double quotes and ends. Well, |
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> this doesn't return anything. If I enter the above command without $, all is |
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> ok. But, if I would like to return just that line contains CLOCK="anything" |
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> and nothing more? For example, |
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|
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No it doesn't. What you want is the regexp ^CLOCK=".*"$ if you want |
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anything (including nothing) between the double quotes, or |
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^CLOCK=".+"$ if you want something (excluding nothing) between the |
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double quotes. |
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|
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The reason that removing the trailing $ worked is that it matched the |
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CLOCK=" part, the * character specifies 0 or more iterates of the |
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previous character, which is " |
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|
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HTH |
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|
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W |
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-- |
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Q: Why won't Heisenberg's operators live in the suburbs? |
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A: They don't commute. |
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Sortir en Pantoufles: up 4 days, 5:24 |
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-- |
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