sudo 免输入密码

vi /etc/sudoers

在

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

 后面一行新增

admin   ALL=(ALL)       NOPASSWD :ALL

同时把后面的%admin注释掉

#
# 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"

#Defaults   !visiblepw

#Defaults    env_reset
#Defaults    env_keep = "COLORS DISPLAY HOSTNAME HISTSIZE INPUTRC KDEDIR \
#                        LS_COLORS MAIL PS1 PS2 QTDIR USERNAME \
#                        LANG LC_ADDRESS LC_CTYPE LC_COLLATE LC_IDENTIFICATION \
#                        LC_MEASUREMENT LC_MESSAGES LC_MONETARY LC_NAME LC_NUMERIC \
#                        LC_PAPER LC_TELEPHONE LC_TIME LC_ALL LANGUAGE LINGUAS \
#                        _XKB_CHARSET XAUTHORITY"


# Host alias specification

# User alias specification

# Cmnd alias specification

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