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How to delete only certain lines
This is a discussion on How to delete only certain lines within the Shell scripting forums, part of the Development/Scripting category; I have a file where a short line with one field (e.g. Mcol2208 is followed either by one or more ...
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07-07-2008, 11:43 PM
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How to delete only certain lines
I have a file where a short line with one field (e.g. Mcol2208
 is followed either by one or more lines with 12 fields or by another short line. I need to delete those short lines that are not followed by a longer one (i.e. Mcol2210: and Mcol3898: in the example below). How can this be done in a shell script?Mcol2208: 51 202_927 Mcol2208 Mcol3898 0.0003 3.91e-03 202 927 726 388 2 26 146 582_1040 Mcol2208 Mcol_DAI 0.0172 3.07e-02 582 1040 459 224 8 82 Mcol2210: Mcol3898: Mcol474: 3 1_530 PhoG2-68 Mcol474 0.0023 1.84e-02 1 530 530 299 1 24 31 135_678 Mcol474 Pho_3590 0.0136 4.67e-02 135 678 544 315 2 25 32 135_703 PhoI1-5 Mcol474 0.0000 1.13e-03 135 703 569 326 0 25 Mcol475: 11 48_503 Mcol475 PhoV52 0.0476 1.35e-01 48 503 456 260 0 13 Help will be greatly appreciated. 
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09-07-2008, 07:14 PM
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Try sed
Code:
sed '/.:$/d' /path/to/file sed '/.:$/d' /path/to/input > /path/to/output cat /path/to/output
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