Q:

Grep ignore multiple lines

Is there a way with Grep to use the -v switch to ignore a line and the next number of lines after it. Its basically to filter exceptions from a log file i.e.
Valid log entry 1
Exception exceptionname
    at a.b.c
    at d.e.f
    ...
Valid log entry 2

grep it to produce : 
Valid log entry 1
Valid log entry 2

I have tried grep -v Exception -A 2
but this doesn't work.
Any ideas would be appreciated.

A:

Try awk:
awk -v nlines=2 '/^Exception/ {for (i=0; i<nlines; i++) {getline}; next} 1'

A:

sed -n '/^Exception/,+2!p' filename

A:

In your case, you might tell grep to also ignore any lines that contain leading whitespace:
grep -v 'Exception|^\s'

