====== BASH - Files - Display every line in a file prefixed with a line number ======

Print line numbers using a tab instead of a space.

<code bash>
awk '{print FNR "\t" $0}' filename
</code>

returns:

<code bash>
1	This would be the 1st line in the file...
2	This would be the 2nd line in the file...
3	This would be the 3rd line in the file...
4	...
</code>