This seems very tricky to me.
I've set up my two systems so that I can
rsync files between them as me, without specifying password. Now the the problem is to
rsync files that belong to
root. On both of my systems, there are no root passwords. The only way to become root is via
sudo. So I can neither give a password for
sudo rsyn local root@remote:, no use my ssh-agent to supply pass phrase. I don't want to set up a root password on any systems; and I do need the files to be owned by root on both systems.
EDIT: Using the files that belong to
root is just an example, I need a way for my unprivileged account to read/write system (including root-owned) files easily. One example is to copy my configured /root environment into the freshly-installed system. The two systems are actually two VMs under a single host, so it's not a big concern for me to copy root-owned files between them.
EDIT 2: If I only want to copy my configured /root environment into the freshly-installed system, I can use tar:
sudo tar cvzf - /root | ssh me@remote sudo tar xvzf - -C /
But I do need
rsync to update from time to time.
Any easy way to make it happen?
EDIT 3: Formally formulate the question
Alright, it all began with the question, how to
rsync files that belong to root between two systems as a normal unprivileged user, without specifying password, under the condition that,
rootaccount is locked on both of systems. I.e., there are no
rootpasswords. The only way to become root is via
sudo(recommended security practice, see http://help.ubuntu.com/community/RootSudo)
- I don't want a completely passwordless
sudobut don’t want to be typing passwords all the time either.
- The normal unprivileged user has entered their ssh pass phrase into the ssh agent.