Inserting Commas to a field 1

[nogs]

In the text file below I would like commas inserted after the 1st , 3rd, 5th, 6th characters;

from this;
20101A60
20102A53
20103A46
20104A39
20105A32
20106A25
20107A18
20108A11
to something like this;
2,01,01,A,60
2,01,02,A,53
2,01,03,A,46
2,01,04,A,39
2,01,05,A,32
2,01,06,A,25
2,01,07,A,18
Thanks for your help in advance

 

[SpiritOfLennon]

use

awk '{ print substr($0,1,1)&quot;,&quot;substr($0,2,2)&quot;,&quot;substr($0,4,2)&quot;,&quot;substr($0,6,1)&quot;,&quot;substr($0,7)}' < input file name > output file name

That should do the trick SOL
Yeah people they won't understand,
Girlfriends they don't understand,
In spaceships they don't even understand,
and me I aint ever gonna understand

 

[nogs]

Thanks SOL that solved it
NOGS

 

[nogs]

SOL
How exactly does substr work, I may need it for further work and cant find any details in man pages

NOGS

 

[SpiritOfLennon]

Here's the excerpt from my man pages, it basically allows you to slice up strings.

substr(s, m[, n])
Return the at most n-character substring of s
that begins at position m, numbering from 1. If
n is omitted, the substring is limited by the
length of strings. SOL
Yeah people they won't understand,
Girlfriends they don't understand,
In spaceships they don't even understand,
and me I aint ever gonna understand