Hi, I’m struggling to write a script to do the following, -will go through each line in the file -in a specific character positions, changes the value to a new value -These character positions are fixed througout the file ----------------------- e.g.: file1.sh will have the following 3 lines, line1 aaaa xxxx line2 bbbb yyyy line3 cccc zzzz After executing the script, content of file1.sh should be, line1 a1aa xx4x line2 b1bb yy4y line3 c1cc zz4z ----------------------- Guru's, thanks a ton in advance Vini

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Hi Nails, Thanks a lot for the response. After digging through the net and "sed" man pages came up with the following, -------------------- sed -e "1n; s/./1/2" -e "s/./4/8" file1.sh > file2.sh mv file2.sh file1.sh -------------------- This is giving me the required output & I'm doing some testing on the same. Thanks Again Regards Vini