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egrep -q "^$username:" /etc/passwd
if [ $? -eq 0 ]; then
echo "found"
fi
I don't understand your question about the carat character. '^' can be inserted like any other character. In VI you...

More information on fflush (http://www.elook.org/programming/c/fflush.html)().

Chubler,

Nice solution for multiple variable matching. The only thing I'd add would be to note that these are 'glob' matching patterns rather than 'regex' patterns for other readers.

So..

A char is RE ([a-zA-Z][\^\$\~])

A fill is RE [\.,]

Freq = fills / (chars + fills)

Input:
F1 F2 F3 F4 Aa$.c$A..,.$,.,$.^~.
F1 F2 F3 F4 one^~.two.a$threeA$four.five$six
F1 F2 F3 F4...

There are some issues with the match strings you supplied. For one some match strings are substrings of others. If you wanted to know occurrences of ".$" and "." you'd have to look at the count of...

Always post some sample data. A couple of input lines and then the desired output. So here's a guess....

{
count = split($9, a, "[.,~^]");
printf ("%s %.3f\n", $0, (count - 1) / $8);
...

Ran Wireshark (WS) and found out a couple things.


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Intermediate...

That wasn't much fun. Took me a while to clue into the fact that arrays are associative and not numeric. Sorting was a pain until I made the element name a combo of the the last field and a record...

find /usr -type d -name '6*' 2>/dev/null | sed 's/.*\///'