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Replace string in file with a variable value

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Top Forums Shell Programming and Scripting Replace string in file with a variable value
# 1  
Old 05-23-2011
Lightbulb Replace string in file with a variable value
Hi Fellows,

I am new to shell, please help we me out in this..
i have file which some lines like this..
[GLOBAL]
$$param1='12-jan-2011'
$$param2='14-jan-2011'
$$param3='30-jan-2011'
.
.
.....so on..

I want to change $$param3 to '31-dec-2011'. i have variable which is storing(30-jan-2011 this is dynamic change everyday) this value..how can i change $$param3 value using my variable to keep all my global parameter dynamic.
# 2  
Old 05-23-2011
Like this?
Code:
oldDate=30-jan-2011
newDate=31-dec-2011
sed 's/'$oldDate'/'$newDate'/' myFile

Since there are no metacharacters in your strings, you could do even simpler:
Code:
sed "s/$oldDate/$newDate/" myFile

This User Gave Thanks to mirni For This Post:
victor369
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