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Top Forums Shell Programming and Scripting Insert a new column with sequence number (Delimiter as comma) Post 302951918 by Don Cragun on Tuesday 11th of August 2015 04:56:25 PM
Old 08-11-2015
If you'd like fixed-length strings of digits in the added column, you might also want to look at the nl utility, perhaps with options something like:
Code:
nl -s, -nrz -w3 file

for right-justified, zero-filled, 3-digit line numbering:
Code:
001,a,b
002,c,d
003,e,f
004,g,h

This User Gave Thanks to Don Cragun For This Post:
 

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