Spotlight on Oracle never connects to the database running on Linux if OS logon and password is supplied.
sar and iostat utilities are not available because sysstat package is not installed on Linux server
Install SYSSTAT package on the Linux server to enable access to sar and iostat required by Spotliglht:
1. Login to the Linux server using the OS Username found in the Spotlight on Oracle connection details and verify the user can issue the iostat and sar commands
2. If the Spotlight OS user is not able to issue the commands, verify that the sysstat package is installed on the Linux server