[Michael Goldsberry]

Linux, SCO, IBM

• What command would you use to create a YP master server?
• If the command "chmod 640 *.*" is issued as root, what will happen?
• Turn this into a number: "rwxr-xr--"
• What user does ufsdump report to?
• If root's ~/.rhosts contains the line "+", what are the implications?
• What init level halts a server?
• What command allows you to see all open network connections?
• If a user calls another shell in their .profile, thus causing an infinite spawning of new shells, can you stop it without rebooting? Could you have denied the infinite loop in the first place?

[Michael Goldsberry]

• What command would you use to create a YP master server?
  ypinit -m

• If the command "chmod 640 *.*" is issued as root, what will happen?
  The wildcard "*.*" matches both "." and "..". ".." references the parent directory. The command given as shown will turn everything on the system into a non-executable. In essence, the system is thoroughly hosed.

• Turn this into a number: "rwxr-xr--"
  754

• What user does ufsdump report to?
  Operator

• If root's ~/.rhosts contains the line "+", what are the implications?
  The system is wide open to remote commands run locally as root. This question implies that rsh and the like are enabled.

• What init level halts a server?
  0

• What command allows you to see all open network connections?
  netstat

• If a user calls another shell in their .profile, thus causing an infinite spawning of new shells, can you stop it without rebooting? Could you have denied the infinite loop in the first place?
  pkill, ulimit