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On 02/12/2011 06:25 AM, meino.cramer@×××.de wrote: |
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> |
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> Hi, |
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> |
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> I am trying to instruct sed to insert a line of text before |
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> a matched line. The whole command should fit into one |
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> physical (command) line. |
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> |
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> Is it possible? And how is it possible? |
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> |
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> Thank you very much for any hint in advance! |
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> Best regards, |
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> mcc |
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> |
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> |
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> |
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|
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Try the ampersand "&" like the example below. |
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|
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Make a file of phone numbers. |
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$ cat phone.txt |
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555-1212 |
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555-1234 |
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555-9999 |
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|
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Then run the following command to prefix the number with 212 and a dash. |
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$ sed 's/555/212-&/' phone.txt |
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212-555-1212 |
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212-555-1234 |
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212-555-9999 |
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|
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Try moving the ampersand around the replacement string. If moved to the |
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beginning it transposes the numbers. Note: The dash was moved to make |
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the result look better, it has nothing to do with the command. |
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$ sed 's/555/&-212/' phone.txt |
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555-212-1212 |
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555-212-1234 |
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555-212-9999 |
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