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And some more ...

4. An Oracle DBA can set up scripts that write messages to alert logs, which basically are files in the underlying OS. Let's say you have just one log file with each message...

# eval $(awk -F'[()]' '/Total:/{split($2,a,",| ");print a[2]"="a[1]";"a[5]"="a[4]}' file)
# echo $Critical
0
# echo $Major
9

That's right ;) did you follow the link ?

In this example we call 9 times cut, one extra sed and one grep.
All can be done by using awk call.

Here's another way:


$
$
$ perl -lne '$ARGV eq "filea" ? $x{substr($_,0,18)}++ : defined $x{substr($_,0,18)} ? print : ""' filea fileb...