How can i have system-config-network-tui or all those system-config-* text user interfaces so that i can use or configure my Ubuntu box using SSH terminal or Serial console terminals.
There is no TUI interfase in debian-like systems for system configuration (except for package configuration).
You have to edit config files. Most of them are very well commented. You can learn a lot just by reading them. Also, you can do much more. GUI interfaces are usually limited only to most popular options.
Assuming, you need to tweak SSH server and you don't know the config file location, you can find it via:
Once you know the config file, make backup, read it, learn and play with it.