Failed to install Fortisiem linux agent on Ubuntu 20.04

I am not very familiar with the agent, but with Linux I may be able to help.

Could you run the installer.sh file without any arguments?

Try again with

installer.sh --verbose

installer.sh --help

installer.sh --debug

Some should give you some debug or at least help on how to enable some sort of debugging the script.

Bash/Linux allows to run additionally the shell interpreter, which NORMALLY is not "bash" but simply "sh". The debug of sh is run with sh -x installer.sh

It might give help on what it is trying to do prior failing.

Best regards,

Markus

If agent password contains special character ensure to enclose them in single quote. 

Also ensure if pre-requisite from linux agent guide has been met.