i run command to update all packages...
the error came like this
E: Couldn't find package libmp3lame-dev
what i need to do...
You haven't really given us much information on exactly what you're doing or more importantly which distro you're using.
Are you updating existing packages or downloading new ones?
Do you already have a version of libmp3lame-dev? or is it a new dependency for one of the packages you're trying to update?
My best guess is you need to download/install the libmp3lame-dev package. But how you'd actually do that would depend on which *nix distro you have installed and which package manager you're using.