====== SED - Numbering - Number each line of a file (number on left, right-aligned) ======

<code bash>
sed = filename | sed 'N; s/^/     /; s/ *\(.\{6,\}\)\n/\1  /'
</code>

----

===== Example =====

Running that command again this file:

<file bash testfile>
aaa
bbb
ccc
</file>

returns:

<file bash testfile>
     1  aaa
     2  bbb
     3  ccc
</file>