How can I get list of available Magento 2 CLI commands?
Please refer this link.
Is auto-suggest feature list out third-party extensions CLI commands?
Yes, to update the list of auto-suggest feature commands run below CLI command php bin/magento setup:upgrade
Is it allow to run other unix commands outside Magento CLI commands like rm, chmod, chown etc?
No. It only allow to run Magento CLI commands.
Is it safe to run CLI commands from the Magento backend using the CLI command runner extension?
Yes, it is safe. The CLI command runner extension not allowing to run other unix commands outside Magento CLI commands like rm, chmod, chown etc.
From where can I get the CLI Command Runner extension?
You can get the CLI command runner extension from here. https://magediary.com/cli-command-runner-for-magento-2.html
Which commands are required to run after installing the CLI command runner extension?
php bin/magento module:enable Magediary_CommandRunner php bin/magento setup:upgrade php bin/magento cache:flush php bin/magento setup:static-content:deploy