Replace a value of a parameter in a file from Bash Script

Question

I have this pair in my configuration file:

TheParameter="TheValue"

I am trying to replace the TheValue from a bash script like, with no luck.

sed 's/TheParameter="(.*)"/TheParameter="NewValue"/' /etc/my.conf 

Can anyone suggest the correct way?

Answer 1

see this example:

kent$  echo 'TheParameter="TheValue"'|sed 's/\(TheParameter="\).*/\1newValue"/'
TheParameter="newValue"

Answer 2

sed, by default, uses basic REs, in which () are not special (don't capture or group). You either need to escape them (\(.*\)), use the -E flag (extended REs), or drop them entirely.