From SED: insert text after the last line? - Unix & Linux Stack Exchange, I learnt that $ if used outside the substitution in sed represents the end of file. This I have tried to use in the follwing to replace all occurences of abc occuring after # Start and till end of the file by 123

Code:

file=Data.txt
Initial="# Start";
Final='\$'
orig="abc";
new="123"; 
sed -i -r -e "\!${Initial}!,\!${Final}!{s!${orig}!${new}!g}" ${file} ;

Data.txt

# Start

abc
abc

$

abc
abc

Output:

# Start

123
123

$

abc
abc

Expected Output:

# Start

123
123

$

123
123

What am I missing? i.e. How to tell to sed that $ means end of the file?