Background
When connecting to EC2 instances using Session Manager, I found that the default shell was set to /bin/sh.
This is frustrating because command history completion doesn’t work.
It’s also tedious to type /bin/bash every time to switch shells.
So, I configured bash to be the default shell.
How to Do It
chsh -s /bin/bash
I thought it would be easy to set up with this command, but it didn’t work as expected, so I did some research.
The solution was actually in the official documentation.
https://aws.amazon.com/jp/premiumsupport/knowledge-center/ssm-session-manager-change-shell/
To enable a configurable shell profile using the Systems Manager console and change the shell to bash, follow these steps:
1. Open the Systems Manager console, and in the navigation pane, click Session Manager.
2. Click the Preferences tab, and then click Edit.
3. Under [shellProfile] for [linux], enter the following:
/bin/bash4. Select Save.
※ Quoted from the official documentation (https://aws.amazon.com/jp/premiumsupport/knowledge-center/ssm-session-manager-change-shell/)
With this configuration, the default shell will be bash when you log in through Session Manager.
Command completion will now work as well.
Official documentation is justice!!
