Append string at the end of line using sed

Question

I want to append the below string at the end of all lines in a file. I tried to search on web but could not get anything relevant. I used the below command too

sed -i -e "s?$?\$dest \$port \$fgt --pin '\$limit' --nogui;"? ipv42

Can someone please help me I want to append the below string in end of all lines in a file

$dest $port $fgt --pin '\$limit' --nogui;

Answer 1

One way can be using the heredoc, backslashed to inhibit variable expansion. What we are doing is providing a fully quoted string(multiline) heredoc.

sed -f - <<\_SED_ inputfile 
s?$?$dest $port $fgt --pin '$limit' --nogui;?
_SED_

Answer 2

Your sed script is almost working, except:

1. the last delimiter of the s command, ?, should be inside the quotes
2. you need to escape $ in the search part, because shell interprets $? as being the exit status of the last executed command.

Correct command:

sed -i -e "s?\$?\$dest \$port \$fgt --pin '\$limit' --nogui;?" ipv42