Solved: How to change default shell in code-server terminal?

[octetiron]

I installed code-server on Ubuntu 20.04 LTS using install script.
However, when I open a terminal in a remote environment, the default shell runs as 'sh', not 'bash'.
I learned from google that the $SHELL variable is a problem, but unfortunately I don't know how to change it.(To be exact, I've tampered with several files, but it didn't work.)

*P.S.: Currently, the default shell for the user is set to 'bash', and 'sh' is executed by default only within the code-server terminal.
'chsh' is already set to '/bin/bash'.

[octetiron]

Self-solved by rebooting.