OpenSUSE Linux Change Hostname (computer name) command

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I am a new OpenSUSE Linux user and setup a server at Linode cloud. They setup my server name to ‘localhost’ during deplyoment but now I would like to change the computer name to something else. How can I remove old name and set it to ‘ln-sg-vpn1’ on OpenSUSE Linux? Can you tell me how do I change the OpenSUSE Linux computer name? How do I assign a static hostname to server running openSUSE Leap 15.0?

GCC: Linux gnu/stubs-32.h: No such file or directory

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I have Debian / Ubuntu Linux. I need to compile software written in C. The gcc throwing an error that read as follows:

gnu/stubs-32.h: No such file or directory compilation terminated. make: *** [foo.o] Error 1

How do I fix this problem under Debian or Ubuntu Linux 64 bit system and compile apps using gcc compiler?