# show from line 12 to line 23
sed -n '12,23 p' archivo.txt

# or just one (line 15)
sed -n 15p archivo.txt

# show from line 12 to line 23
sed -n '12,23 p' archivo.txt

Some times you need some specific range of lines from a file and the commands 'head' and 'tail' are not enough for you. This could be a easy solution for this problem.

Show few lines from a file with sed

Bash, files

Bash