How the shell used by the user in Ubuntu is specified

On the machine to open an account to colleagues, the result of SSH landing, complete, highlighting are not, but my own account can be. The first suspicion is that there is a problem with the. bashrc file setting, compared to 2 user directories, this file does not find a place to be. Search learned that may be used by the shell is different, because the completion is generally through a corresponding completion of the script or built-in complement function, all inferred 2 users use different shell, so in 2 users respectively Echo $SHELL, sure enough, one is/bin/bash, one is/ Bin/sh, and SH is a symbolic link, pointing to/bin/dash,ubuntu by default is dash, generally through the/bin/sh symbolic link to point to, if you want to switch it to bash, execute:

sudo dpkg-reconfigure Dash

Select Yes, no to switch Ubuntu default shell, but this will affect other users, can you specify the shell they use for different users individually? Open/etc/passwd File:

The last field for the user specifies the shell type to be used when the user logs in, and if not specified, the default/bin/sh is used. How do I change this setting?

sudo usermod-s user name Shell type

How the shell used by the user in Ubuntu is specified