sed转义单引号内的双引号

Question

I'm trying to add a log format to nginx.conf inside a Docker container via sed. I'm issuing the following command:

sed -i -e"s/client_max_body_size 100M/client_max_body_size 100M;\n\tlog_format specialLog '$remote_addr forwarded for $http_x_real_ip - $remote_user [$time_local]  '
                                                                                                  '"$request" $status $body_bytes_sent '
                                                                                                  '"$http_referer" "$http_user_agent"'/" /etc/nginx/nginx.conf

However it is giving me the following error:

sed: -e expression #1, char 105: unterminated `s' command

How can I escape the log_format command?

Answer 1

Just use awk:

awk '1; /client_max_body_size 100M/{ print "some text" }' file

If you edit your question to show some sample input and expected output we can show you exactly how to replace some text with your real text.