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12-07-2004
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reading file
Hi
I ‘m trying to write a simple script that will be able to extract some useful info from a file of this format: + 1.84375 0 2 cbr 210 ------- 0 0.0 3.1 225 610 - 1.84375 0 2 cbr 210 ------- 0 0.0 3.1 225 610 r 1.84471 2 1 cbr 210 ------- 1 3.0 1.0 195 600 r 1.84566 2 0 ack 40 ------- 2 3.2 0.1 82 602 + 1.84566 0 2 tcp 1000 ------- 2 0.1 3.2 102 611 - 1.84566 0 2 tcp 1000 ------- 2 0.1 3.2 102 611 r 1.84609 0 2 cbr 210 ------- 0 0.0 3.1 225 610 + 1.84609 2 3 cbr 210 ------- 0 0.0 3.1 225 610 d 1.84609 2 3 cbr 210 ------- 0 0.0 3.1 225 610 - 1.8461 2 3 cbr 210 ------- 0 0.0 3.1 192 511 r 1.84612 3 2 cbr 210 ------- 1 3.0 1.0 196 603 + 1.84612 2 1 cbr 210 ------- 1 3.0 1.0 196 603 - 1.84612 2 1 cbr 210 ------- 1 3.0 1.0 196 603 + 1.84625 3 2 cbr 210 ------- 1 3.0 1.0 199 612 For example I want to extract the information in column 18-22 but say only the number values (not necessarily all at once). Using cut utility (i.e. cut –d 18-22 filename) I get 210 210 210 40 - 1000 1000 210 210 210 210 210 210 210 210 But I only need the value without the - character In other word for each line I need the field value and I cant use [ cut –f ] because there only separated by spaces. Any ideas or know of a good Unix tutorial for beginners. Thanks |
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