How can I print the n'th line of a file?
The dirty (but not quick) way would be sed -n ${n}p "$file" but this reads the whole input file, even if you only wanted the third line.
The following sed command line reads a file printing nothing (-n). At line $n the command "p" is run, printing it, with a "q" afterwards: quit the program.
sed -n "$n{p;q;}" "$file"Another way, more obvious to some, is to grab the last line from a listing of the first n lines:
head -n $n $file | tail -n 1
Using awk:
awk 'NR==n{print;exit}' file