Linux - show few lines in a file

# Using head - Print few lines (5 lines) from the top of a file
head -n 5 file.txt

# Using tail - Print few lines (5 lines) from the bottom of a file
tail -n 5 file.txt


# Using sed

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

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