head [OPTION]... [FILE]...
##OPTIONS
"-n num: Prints the first ‘num’ lines instead of first 10 lines. num is mandatory to be specified in command otherwise it displays an error."
head -n 5 file.txt
"-c num: Prints the first ‘num’ bytes from the file specified. Newline count as a single character, so if head prints out a newline, it will count it as a byte. num is mandatory to be specified in command otherwise displays an error."
head -c 6 file.txt
"-q: It is used if more than 1 file is given. Because of this command, data from each file is not precedes by its file name."
head -q file1.txt file2.txt
"-v: By using this option, data from the specified file is always preceded by its file name."
head -v file.txt