1) How to Print/Display first line of a file?
>> head -1 file.txt
head -1 prints first line in the file specified.
Or you can use 'sed' command.
$> sed '2,$ d' filename.txt'
Sed command deletes all the lines starting from 2nd line to end of line [Represented by '$']. Though sed command does not modify file content. It only prints first line.
