我安装的时候出现了
klot@klot:~$ sudo --help
sudo:please use single character options
sudo:unable to lookup klot via gethostbyname()
usage:....
usage:....
klot@klot:~$ postdrop

unable to look up puplic/pickup:No
such file or directory
的问题
还有
klot@klot:~$ sudo mount dev/cdrom /mnt/cdrom
sudo:unable to lookup klot via gethostbyname()
password:postdrop

unable to look up puplic/pickup:No
such file or directory
是为什么啊??
我没按装sudo吗?需要安装吗?
需要root密码吗?如果要,是多少?我怎么没设置过?谢谢