A. 对 B. 错
A. ①② B. ①②③ C. ②③ D. ①③
A. /root B. /opt C. /etc D. /tmp
A. 完全从缓存中运行,而不去下载或者更新任何文件 B. 设置错误等级(0-10) C. 详细模式 D. 指定配置文件
A. bin/hdfs dfs reset B. bin/hdfs namenode -format C. sbin/start-dfs.sh D. sbin/stop-dfs.sh
A. ssh-copy-id -i ~/.ssh/id_rsa.pub本地主机名远程主机名 B. ssh-copy-id-i~/.ssh/id_rsa.pub远程主机名 C. ssh-copy-id-e ~/.ssh/id_rsa.pub本地主机名远程主机名 D. ssh-copy-id-e ~/.ssh/id_rsa.pub远程主机名