单项选择题 A non-root user can run rsh commands from serverA to serverB, but attempts to run rsh commands by the root user return with apermission error message. What action will resolve the problem?（）

单项选择题 Which command restores files from a volume group backup on a specified media?（）

单项选择题 Which port must be open on the HMC to allow remoteweb access？（）