bash scripting: increment

SirDavisCarrots · 22-March-05, 09:06 AM

do any of you know how to increment in bash?

or change type (string to interger)

trying to write a syncronization thing and sync's the passwd file on one server to the other

figured out awk and sed pretty cool commands

FunkyFresh · 22-March-05, 09:40 AM

It's been about 10 years since I've done bash scripting, but this should work. If someone has a better way, I'd love to know it since this seems pretty crude to me.

Code:

i=1;
i=`expr $i + 1`;
echo $i;

That code will print "2" when you run it. And by the way, those single quotes are the ones on the tilde key (~), not on the double-quote key ("). Then again, if you've already figured out sed and awk, you probably knew that...

By the way, it also works just the same if the first line is a string; the conversion should be automatic.

Code:

i="1";

22-March-05, 09:06 AM		#1 (permalink)
SirDavisCarrots Apex Master Tech	bash scripting: increment do any of you know how to increment in bash? or change type (string to interger) trying to write a syncronization thing and sync's the passwd file on one server to the other figured out awk and sed pretty cool commands

22-March-05, 09:40 AM		#2 (permalink)
FunkyFresh 'Da Doctor of Funk	It's been about 10 years since I've done bash scripting, but this should work. If someone has a better way, I'd love to know it since this seems pretty crude to me. Code: i=1; i=`expr $i + 1`; echo $i; That code will print "2" when you run it. And by the way, those single quotes are the ones on the tilde key (~), not on the double-quote key ("). Then again, if you've already figured out sed and awk, you probably knew that... By the way, it also works just the same if the first line is a string; the conversion should be automatic. Code: i="1";

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