Character Substitution with Awk or Sed

[qusan]

I have a file with multiple records:
0287C04200302201511330000000133986589898989 160180 00000001xxxx_xxxx_020_xxxxx.dat

I need to change characters 35-42 to zeros. Is there a substitution command to do this with awk or sed?

 

[CaKiwi]

awk solution (untested)

awk '{print substr($0,1,34) "00000000" substr($0,43)}' infile > outfile

Somebody will be along with the sed solution soon

CaKiwi

 

[stefanwagner]

#
# substitute 12....345...678 -> 12...340...078
#
s/^\(.\{34\}\)\(.\{7\}\)\(.*\)/\10000000\3/g


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