sudo命令中没有密码提示

每当我发出命令sudo apt-get install **时，它都不要求输入密码，也不在我的管理员用户中。

如何提示输入密码？

我的sudoer：

ubuntu:~$ sudo cat /etc/sudoers
#
# This file MUST be edited with the 'visudo' command as root.
#
# Please consider adding local content in /etc/sudoers.d/ instead of
# directly modifying this file.
#
# See the man page for details on how to write a sudoers file.
#
Defaults    env_reset
Defaults    secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"

# Host alias specification

# User alias specification

# Cmnd alias specification

# User privilege specification
root    ALL=(ALL:ALL) ALL

# Members of the admin group may gain root privileges
%admin ALL=(ALL) ALL

# Allow members of group sudo to execute any command
%sudo   ALL=(ALL:ALL) ALL

# See sudoers(5) for more information on "#include" directives:

#includedir /etc/sudoers.d
ALL ALL=(ALL) NOPASSWD:ALL

/etc/sudoers使用编辑sudo visudo，并删除最后一行：

ALL ALL=(ALL) NOPASSWD:ALL

（顺便说一句，请注意，这条线在文件的结尾是不是做的首选方式sudo 不提示输入密码，对于那些谁想要做到这一点。）

使用此命令查找问题的根源：

sudo grep -HRn NOPASSWD /etc/sudoers.d/

就我而言：

/etc/sudoers.d/50_stack_sh:1:username ALL=(root) NOPASSWD:ALL

用＃注释行并关闭终端。

我认为最好在文件末尾添加“ admin用户”，因为admin不必在终端中的每个顺序中都输入密码，并且不允许其他用户也这样做：

# This file MUST be edited with the 'visudo' command as root.
#
# Please consider adding local content in /etc/sudoers.d/ instead of
# directly modifying this file.
#
# See the man page for details on how to write a sudoers file.
#
Defaults    env_reset
Defaults    secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
# Host alias specification
# User alias specification
# Cmnd alias specification
# User privilege specification
root    ALL=(ALL:ALL) ALL
# Members of the admin group may gain root privileges
%admin  ALL=(ALL) ALL
# Allow members of group sudo to execute any command
%sudo   ALL=(ALL:ALL) ALL
# See sudoers(5) for more information on "#include" directives:
#includedir /etc/sudoers.d
# ALL ALL=(ALL) NOPASSWD:ALL
(user here) ALL=(ALL) NOPASSWD:ALL