If the backspace key is not working as expected on a Solaris system, there could be a few potential causes:
The terminal settings may be incorrect. Try running the stty erase command to check the current terminal settings, and use the stty erase ^H command to set the backspace key to work as expected.
The terminal emulator you are using may not be configured correctly. In this case, you may need to modify the terminal emulator's settings to make the backspace key work as expected.
There could be a problem with the terminal emulator itself. Try using a different terminal emulator to see if the issue persists.
There could be a problem with the keyboard itself. Try using a different keyboard to see if the issue persists.
If none of these solutions solve the problem, you may need to dig deeper to determine the root cause of the issue. You could try checking log files or running diagnostic tests to troubleshoot the problem further.