Switching the vCenter Server Appliance to Appliance Shell

Currently, the vCSA is bundled with these supported shells:
BASH Shell
Appliance Shell
Switching the vCenter Server Appliance 6.x to BASH Shell

Log in to the vCenter Server Appliance through SSH.
Run this command to enable access the Bash shell:

shell.set --enabled true

Type shell and press Enter.
In the temporary BASH shell, run this command to permanently configure the default Shell to BASH for Root:

chsh -s /bin/bash root

Log out from the BASH Shell.
Log in again for the changes to take effect.

Note: For 6.7 please do the below.
Log in to the vCenter Server Appliance through SSH.
Type shell and press Enter.
In the temporary BASH shell, run this command to permanently configure the default Shell to BASH for Root:

chsh -s /bin/bash root

Log out from the BASH Shell.
Log in again for the changes to take effect.

Log in to the vCenter Server Appliance through SSH.
Run this command to change from using the BASH Shell to the Appliance Shell:

chsh -s /bin/appliancesh root

Log out from the Appliance Shell.
Log in again for the changes to take effect.