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hello, i'm trying to pluck words from a list that have exactly 3 occurances of a specified letter. I've come up with this :
grep -i .*$1.*$1.*$1.*
But this also selects words with 4 or more, any...

not entirely unix orientated but....
anyway i've got an old 486dx? 100 that i'll looking to turn into a unix running machine. But everytime i turn it on it comes up with and invalid CMOS checksum,...

cheers for your help

hello,

i'm looking to split up text into a list of words but can't figure it out, any help would be great.

thanks
steven