Adding a sequence number within a file

Shell Programming and Scripting
1

Can someone please help.

I need to add a sequence number to the start of each line of a file.
It needs to be 6 characters long. ie 000001 next line starts 000002 etc.

2 
nl -nrz oldfile > newfile

Thew default width is usually 6, you change it with

nl -w n

where n = width in characters

3

Thanks for that.
Its putting out a ^I after the line number. Is it possible to remove this?

Thanks

4

'man nl'

     -ssep sep is the character(s) used in  separating  the  line
           number and the corresponding text line. Default sep is
           a TAB.
5

You can do like this:

awk '{ printf ("%.6d %s\n", NR, $0) }' oldfile > newfile