OliveTin just runs commands. If the command exits with an unusual exit code (something other than 0), OliveTin will tell you. Many Linux commands will exit with code 1, 2, 3, etc to indicate different types of errors.
It’s important to understand that OliveTin is just reporting back what the command exited with, it’s very unusual for OliveTin to cause new types of errors!
For example, if
ping exits with code 1 or 2, the documentation for ping says
that this indicates either a name not found, timeout, or other similar error.
The best thing you can do is
man ping to read the ping manual page to find
Exit code 127 is used by the Linux shell to indicate "Command not found". Most often this means you need to install the command (often in the linux container image).