You can use the head command to output the beginning of the file. Use this when you want to check only the beginning of the file.
The head command is fast because it doesn't read the entire file.
Head command sample
This is a sample head command that displays the beginning of foo.txt.
Specify the number of lines to display at the beginning
You can specify the number of lines to display at the beginning by specifying the number of lines after the hyphen. The following example displays the first 20 lines.
head -20 filename