Question

i’m trying to write a grep/sed/awk for a condition from a file, and at the same time with a negative condition (does not contain xxx) and also i wanna grep all the lines that are > than a certain line number.

Answer 1

Awk should deal with that nicely:

/condition/ && ! /negative condition/ { print $0; outputdone = 1 }

{ if(NR > certain_line_number && !outputdone) print $0
  outputdone = 0
}

I wasn’t quite certain if all the conditions were applied together. I guessed that you always want to print lines beyond some point, but up to that point the positive and negative conditions applied.