RE: Unix question

For single character replacement (or removal) use "tr". For string to string replacement use sed. echo $var | tr "e" "o"
-or-
echo $var | sed "s/e/o/g" # (the '/g' means globally)
  Mandar Ghosalkar <MandarG_at_gsr-inc.com> wrote:

check this question from korn faq at
http://www.kornshell.com/doc/faq.html
 

Q24. How do I do global substitutions on the contents of shell variables?A24. Use // instead of / for global substitution, ${var//aa/bb} willexpand to the value of  with each "aa" replace by "bb". so i tried
$ var=tester$ echo $vartester$ echo ${var//e/o}bad substitution$
 

anyone out there :)
 

-Mandar
 

-----Original Message-----From: Big Planet [mailto:bigplanet34_at_hotmail.com]Sent: Friday, March 23, 2001 7:56 PMTo: Multiple recipients of list ORACLE-LSubject: Unix question Hi geeks ,
How can I do substr and instr kind of operaion in unix shell script . is it possible ? like i have one paramter as "hostname" .. I want to trim quotes surrounding the hostname . One more question , is possible to read another text file line by line using a shel script and then edit that file . Actually I have this configuration file for my system which have keywords like $HOSTNAME$ , $SCHEMA$ which I want to replace with actual values at the time of installation by asking questions to the user.
 

TIA
--Big planet
 
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