ubuntu添加账号

useradd -d /home/test -m -s /bin/bash test

vim /etc/sudoers
test ALL=(ALL) nopASSWD: ALL

查看所有用户的crontab

for u in `cat /etc/passwd | cut -d":" -f1`;do crontab -l -u $u;done

ubuntu ssh key登陆

ll ../.ssh/ -d    #700权限
drwx------ .ssh//

ll  authorized_keys     #600权限
-rw-------  authorized_keys

ssh 连接提示 Permission denied (publickey) 怎么破？

cat  /etc/ssh/sshd_config 
AllowUsers *@IP