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I am just learning Linux, using Bash. I have a small program that uses a menu to add, delete, search, and find players on a team roster. The roster list of players (database) is made of 6 fields, separated by colons. For example:
Entry#:Last Name:First Name:Position:Year:Phone Number
My problem is when my script runs to search for a player, which searches by entry #, there are sometimes multiple players listed.
The search script uses a grep command, and finds numbers in the entry # column and the phone # column.
Can I limit a grep command to search just the first column?
Did you check the man page? It'd be something like 'cut -d: -f5 | grep thing-I-want-to-find'
Oh. Oops. Row? Or column? Cut will chop a column from a line and grep will 'cut' a line from a list, so to speak. Come to think of it, cut's no good if you're wanting to extract the whole line. I don't really know regular expressions but, if the problem is that you have numbers at the beginning (numbering entries) and numbers at the end (phone numbers) and 'grep 5' gives you row 5 *and* everybody whose phone number has a five in it, then 'grep ^5' will do it. That basically means 'lines beginning with 5'. That's only useful for that specific, and I don't know that that's your complete situation, but you can do far more complicated stuff with those principles, anyway.