head - output the first part of files
Display the first 10 lines of a file (default):
head filename.txt
Show the first 5 lines of a file:
head -n 5 filename.txt
Show the first 30 bytes of a file:
head -c 30 filename.txt
show the filename along with the first 10 lines:
head -v filename.txt
Display the first 20 lines of a file using NUL as the delimiter:
head -z filename.txt
Display the version of head command and exit:
head --version