Thanks for reporting this bug and helping to make Ubuntu better.
For some reason, your system does not have sed installed. This is worrisome because it is a dependency of lsb-base, which itself is 'required', meaning you absolutely should have it.
Could you please try 'apt-get install sed lsb-base', and let us know (a) if that works and (b) if, after that, you are able to install samba-common?
Thanks for reporting this bug and helping to make Ubuntu better.
For some reason, your system does not have sed installed. This is worrisome because it is a dependency of lsb-base, which itself is 'required', meaning you absolutely should have it.
Could you please try 'apt-get install sed lsb-base', and let us know (a) if that works and (b) if, after that, you are able to install samba-common?