replace string in variable

Posted on 2004-10-20
Medium Priority
Last Modified: 2010-04-21
hello, all

  i am coding a linux shell scripts, where a variabe "X1=ABCEDFG" is defined, how can i use other string, like "./",  to replace "X1=" ?

thanx in advance

Question by:kim_wei
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LVL 18

Expert Comment

ID: 12358260
Not sure I understand your question.
Do you want a variable called "./" ?
If so I don't think you can as they are reserved metacharacters.
If not can you explain more?

Author Comment

ID: 12359410
hello, liddler,
  a piece of code like following,

echo $DEF_STR

  i just want to use "./" to replace "X1=", so it would look like,

DEF_STR="./ABCED", hopefully it is clear.

LVL 18

Expert Comment

ID: 12359569
you can use sed
sed 's/X1=/\.\//g' script.sh > script1.sh

This will replace the string X1= with ./ wherever it appears in the file script.sh and save the output in script1.sh

Author Comment

ID: 12367286
hello, liddler

   i really don't want to have additional file generated in my code, is it possible to perform this replacement only in scripts scope?

LVL 18

Accepted Solution

liddler earned 150 total points
ID: 12367383
but you can do:
sed 's/X1=/\.\//g' script.sh > script1.sh && mv script1.sh script.sh
to rename script1.sh back to script.sh

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