How can I prepend a line number and tab to each line of a text file?
How can I append a line number and tab to the beginning of each line of a text file?
Solution 1:
awk '{printf "%d\t%s\n", NR, $0}' < filename
Solution 2:
The nl command should do this, but it adds space before the line number too. It's part of Linux coreutils.
nl lines.txt
1 $bkWTN
2 $cV8$.