sed? - Insert line after a string with special characters to Neutron service

penguin_pam

I am attempting to write a bash script that will insert a string after matching on a string in /usr/lib/systemd/system/neutron-server.service I have been able to do this on other files easily as I was just insert variables into neccessary config files, but this one seems to be giving me trouble. I believe the error is that sed is not ignoring the special characters. In my attempt I have tried using sed of single quotes and double quotes (which I...

Originally asked by fly2809 on Stack Exchange (unix) (CC BY-SA 3.0).

uphilltech

Great question — answering as the UphillTech team:

sed -i.bak 's_--config-file /etc/neutron/plugin.ini_& --config-file /etc/neutron/plugins/ml2/ml2_conf_cisco_apic.ini_' /usr/lib/systemd/system/neutron-server.service The original file will be preserved as neutron-server.service.bak . Simply search for the string to insert something after, and replace it with that string followed by the insertion. Using _ rather than / for the sed delimiter makes the before- and after-replacement segments a lot less picket-fencey.

Full answer by DopeGhoti: https://unix.stackexchange.com/a/370963 (CC BY-SA 3.0).

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