Shell Programming and Scripting

Hello;

i have a log file which had Invalid, error, missing words in it.
I want to grab a line which matches either of the above words and one more line below the grepped line.

Can this be done?
I looked on other places on your forum, but there is nothing which is working.
I tried following things:

sed -n '/Invalid/ {p; n; p;}' r0035251.rpt <--- But this one does not have a case sensitive as well as multiple pattern matching.

nawk is not available on my system

grep -B <---- again not available.

egrep -i command gives me the matched line, but I am not sure how to combine it with sed to be able to display the next line too!

Can anyone help?

Thanks
Josh
thanks

Code:

awk '/error/ || /Invalid/ {print;getline;print}' file

thanks it works good!
How to add a case sensitive option to it.
i.e.: Want to grab either "Error" or "error"

Thanks much for quick response!
Josh

Code:

awk 'tolower($0) ~ /error/ || tolower($0) ~ /invalid/ {print;getline;print}' file

last one more thing....i want to put this output to a file.
When I use awk..... >> a.log

it does not work.

thanks!

Works alright for me...send its output to a.log w/o a problem

Code:

awk 'tolower($0) ~ /error/ || tolower($0) ~ /invalid/ {print;getline;print}' file > a.log

GNUgrep can also do this if you have it installed.

grep -i -A 1 error log.file >a.log

-i case insensitive
-A number of context lines after the found line

other switches that may be useful:

-B number of context lines before the found line
-C number of context lines both before and after the found line