Unable to launch Steam on Ubuntu. Checked all options.
No, I didn't try that command.
During that process it mentions "command not found." Please ensure the correct command is included.
Move to the desired directory: cd /usr/games && ./steam
Did you attempt this? Move libstdc++.so.6 to a backup location and then to the x86_64 directory.
Try this command in the terminal: LD_PRELOAD='/usr/$LIB/libstdc++.so.6' DISPLAY=:0 steam