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Hi
i have a quick grep question, say there's a big file where there are many instances of "1125" on differnent lines. however, I just want the four letters before 1125, what's the grep command line to show only one of the many instances with only the "YYYY1125" as output?
I read thru man grep and most of which was regarding to the number of lines
thanks
The above grep command will work, as long as you happen to have a tab or some other delimiter before the four characters and the 1125, and only one 1125 per line. But that's a big if, I guess !
You could also use head/tail to chop the output, but awk would be more reliable, as per whansard's suggestion.
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