Shell Programming and Scripting

Hi all
I am new babie to shell script, so please advise me n help me .

suppose i have a string "abacus sabre", i need to replace occurences 'ab' with 'cd' and i need to store this result into same string and i need to return this result from script to the calling function, where as the string is passed from calling function.

i tried like this

mainStr="abacus"
old_word="ab"
new_word="cd"
result=`sed -i s/$old_word/$new_word $mainstr `
return $result

Hi Reddy,

The below script will work for you,

mainStr="abacus"
old_word="ab"
new_word="cd"
result=`cat $mainStr | sed "s/$old_word/$new_word/g"`

Hi

This is the same question you posted in:

https://www.unix.com/shell-programmin...rt-string.html

Please folow the forum rules and do not multiple post....

however...following examples should help you on your way a little:

Code:

#  mainstr="abacus sabre"
#  echo $mainstr
abacus sabre

#  echo $mainstr | sed 's/ab/cd/g'
cdacus scdre
#  echo $mainstr
abacus sabre

#  mainstr=`echo $mainstr  | sed 's/ab/cd/g'`
#  echo $mainstr
cdacus scdre

how do i delete duplicate lines with sed.can anyboda help me plz...!

mmoutairek,

Please don't hijack another's thread with your unrelated question but start a new thread.

Regards