i am not getting the uniform result beacuse of the spaces inbetween. I aim id to get the current date , and then serach for grep ORA- CURRENTDATE log files .
Plz help.
Last edited by methyl; 04-05-2012 at 04:09 PM..
Reason: please use code tags
Please post sample ORA- error lines from your log files (we need to see the "current date" format) and sample non-error lines. If you can, please include sample lines where the day-of-month is a single digit as well as those where the day-of-month is a double digit.
Please make it clear whether all these log files are in the same directory or whether there are subdirectories (I noticed your use of ls with the -r switch).
In my recollection Oracle logs contain all sorts of uninteresting ORA lines which are not errors. These logs however look like an Oracle custom application log, so let's assume that every ORA- line is an error.
Judging from the size of these logs you are probably not starting a new one each day (or each week, or each database restart, or whatever). Logs can become unmanageable if you don't archive them frequently - depends on local rules.
Please clarify whether you are trying to search logfiles with a unix directory timestamp of today's date, or looking through every logfile for error lines which contain today's date?
Last edited by methyl; 04-05-2012 at 05:05 PM..
Reason: typos
In principle it's relatively simple. It reads lines one by one, splits it into tokens, and runs the code you give it for each individual line. So '{ print $8 }' gets run for each individual line, printing the 8th column.
You can also tell it to run a code block only when a condition happens, like:
Code:
#Whenever the first column is ASDF, print the 8th column
awk '$1 == "ASDF" { print $8 }' filename
# Whenever the regex /ASDF/ matches the entire line, print the 8th column
awk '/ASDF/ { print $8 }'
You can also use variables, and even arrays, and especially, associative arrays -- arrays which can use strings as indexes. A["slartibartfast"]=32; print A["slartibartfast"] would print 32 for instance.
You can have more than one code block which runs under different conditions. You could use this to find only unique values in a column:
Code:
# For each line, set A["first column"]=1.
# Once all processing is done, print every array index.
awk '{ A[$1]=1 } END { for(X in A) print X }' file
And it's configurable, too. Usually, spaces and newlines are used to separate columns and lines, but it can use whatever you want instead! Lots of possibilities from a few simple rules.
P.S: $ is an operator, not a variable. $1 is column 1. You can also use it on a variable: N=5; print $N that would use the value of N to select column 5.
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04-05-2012
