sed - how to insert chars into a line

Shell Programming and Scripting
1

Hi I'm new to sed, and need to add characters into a specific location of a file, the fileds are tab seperated.

text <tab> <tab> text <tab> text EOL

I need to add more characters to the line to look like this:

text <tab> <tab> newtext <tab> text <tab> text EOL

Any ideas?

2 
root@isau02:/data/tmp/testfeld> od -c infile
0000000   t   e   x   t  \t  \t   t   e   x   t  \t   t   e   x   t  \n
0000020
root@isau02:/data/tmp/testfeld> sed 's/^text\t\t/&newtext\t/' infile
text            newtext text    text
root@isau02:/data/tmp/testfeld> sed 's/^text\t\t/&newtext\t/' infile > outfile
root@isau02:/data/tmp/testfeld> od -c outfile
0000000   t   e   x   t  \t  \t   n   e   w   t   e   x   t  \t   t   e
0000020   x   t  \t   t   e   x   t  \n
0000030
3

Many Thanks for your reply, I found out about "tr" and translated the file tabs to ":" and once my edits were completed, used "tr" to put them back. Its Solaris 9 and sed doesnt like \t, but tr does.

All the best.