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sed :Unterminated s command

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Hi I'm getting this unterminated s command prob. #echo $out ==> Unix Command and then a newline character (When i tried seeing octal dump by using "echo $out | od -bc"), it showed a newline character #echo $string ==> "Welcome.Unix Command" and then a newline at the end.. #echo $string | sed "s/$ban//g" this command is giving "unterminated s command" bcoz shell is interpreting the newline character.. how can i prevent this.. Also, can i remove a newline character at the end of a string using sed..??

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