How to use sed to delete all lines before the first match of a pattern?
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If you put a little bit of explanation with your answer, assuming it's not just 'RTFM', which, let's face it, could answer 90% of posts here, we can all learn or refresh/reinforce our knowledge from it.
sed -n '/sweet/,$p' filename
-n don't print lines by default
/sweet/,$ is a restriction for the following command p, meaning 'only look from the first occurence of 'sweet' to '$' (the end of the file)
With homework problems, we normally avoid simply handing over the answer.
I have to use sed with this problem, and sed is extremely complicated
Au contraire!! SED is one of the simplest utilities in the toolbelt, with very limited action options. What you may be referring to is the fact that SED can be used to generate totally incomprehensible statements/scripts---many of which could be done better with some other tool........Watch for the periodic "SED vs. AWK" skirmishes here at LQ.
All variables in awk start with a value of 0, so until we first encounter sweet the 'i' at the end will be 0 so false therefore nothing to be done.
Once we find sweet and increase 'i' with '++', now 'i' is not zero (therefore true) and we do the default action which is to print the line