<user> <host> = [<operator user> [<par>]] <command list>

chenmh localhost = (root)    NOPASSWD: /bin/mkdir test

## Sudoers allows particular users to run various commands as## the root user, without needing the root password.#### Examples are provided at the bottom of the file for collections## of related commands, which can then be delegated out to particular## users or groups.## ## This file must be edited with the ‘visudo‘ command.
##可以将多个host配置成一个host别名## Host Aliases ## Groups of machines. You may prefer to use hostnames (perhaps using ## wildcards for entire domains) or IP addresses instead.Host_Alias     FILESERVERS = 192.168.137.40,192.168.137.30# Host_Alias     MAILSERVERS = smtp, smtp2
##将多个user配置成一个user别名## User Aliases## These aren‘t often necessary, as you can use regular groups## (ie, from files, LDAP, NIS, etc) in this file - just use %groupname ## rather than USERALIASUser_Alias ADMINS = chenmh###接下来是命令别名，就是将一组命令放在一起，这样可以简便配置## Command Aliases## These are groups of related commands...## Networking# Cmnd_Alias NETWORKING = /sbin/route, /sbin/ifconfig, /bin/ping, /sbin/dhclient, /usr/bin/net, /sbin/iptables, /usr/bin/rfcomm, /usr/bin/wvdial, /sbin/iwconfig, /sbin/mii-tool## Installation and management of software# Cmnd_Alias SOFTWARE = /bin/rpm, /usr/bin/up2date, /usr/bin/yum## Services# Cmnd_Alias SERVICES = /sbin/service, /sbin/chkconfig## Updating the locate database# Cmnd_Alias LOCATE = /usr/bin/updatedb## Storage# Cmnd_Alias STORAGE = /sbin/fdisk, /sbin/sfdisk, /sbin/parted, /sbin/partprobe, /bin/mount, /bin/umount## Delegating permissions# Cmnd_Alias DELEGATING = /usr/sbin/visudo, /bin/chown, /bin/chmod, /bin/chgrp ## Processes# Cmnd_Alias PROCESSES = /bin/nice, /bin/kill, /usr/bin/kill, /usr/bin/killall## Drivers# Cmnd_Alias DRIVERS = /sbin/modprobe
###这个是我自己配置的命令别名，将mkdir和rm命令配置在一起分配给某个用户##userdefinCmnd_Alias OTHERS = /bin/mkdir, /bin/rm# Defaults specification## Disable "ssh hostname sudo <cmd>", because it will show the password in clear. #         You have to run "ssh -t hostname sudo <cmd>".#Defaults    requiretty## Refuse to run if unable to disable echo on the tty. This setting should also be# changed in order to be able to use sudo without a tty. See requiretty above.#Defaults   !visiblepw## Preserving HOME has security implications since many programs# use it when searching for configuration files. Note that HOME# is already set when the the env_reset option is enabled, so# this option is only effective for configurations where either# env_reset is disabled or HOME is present in the env_keep list.#Defaults    always_set_homeDefaults    env_resetDefaults    env_keep =  "COLORS DISPLAY HOSTNAME HISTSIZE INPUTRC KDEDIR LS_COLORS"Defaults    env_keep += "MAIL PS1 PS2 QTDIR USERNAME LANG LC_ADDRESS LC_CTYPE"Defaults    env_keep += "LC_COLLATE LC_IDENTIFICATION LC_MEASUREMENT LC_MESSAGES"Defaults    env_keep += "LC_MONETARY LC_NAME LC_NUMERIC LC_PAPER LC_TELEPHONE"Defaults    env_keep += "LC_TIME LC_ALL LANGUAGE LINGUAS _XKB_CHARSET XAUTHORITY"## Adding HOME to env_keep may enable a user to run unrestricted# commands via sudo.## Defaults   env_keep += "HOME"Defaults    secure_path = /sbin:/bin:/usr/sbin:/usr/bin## Next comes the main part: which users can run what software on ## which machines (the sudoers file can be shared between multiple## systems).## Syntax:####      user    MACHINE=COMMANDS#### The COMMANDS section may have other options added to it.#### Allow root to run any commands anywhere root    ALL=(ALL)       ALL## Allows members of the ‘sys‘ group to run networking, software, ## service management apps and more.# %sys ALL = NETWORKING, SOFTWARE, SERVICES, STORAGE, DELEGATING, PROCESSES, LOCATE, DRIVERS###sys这个组中的用户可以执行相关的命令组的权限，多个命令组用逗号分隔## Allows people in group wheel to run all commands# %wheel        ALL=(ALL)       ALL## Same thing without a password# %wheel        ALL=(ALL)       NOPASSWD: ALL## Allows members of the users group to mount and unmount the ## cdrom as root# %users  ALL=/sbin/mount /mnt/cdrom, /sbin/umount /mnt/cdrom###users组的用户可以执行挂载和卸载/mnt/cdrom目录的权限## Allows members of the users group to shutdown this system# %users  localhost=/sbin/shutdown -h now###users组的用户可以执行关机命令## Read drop-in files from /etc/sudoers.d (the # here does not mean a comment)#includedir /etc/sudoers.d

ADMINS  FILESERVERS=(ALL)    NOPASSWD:OTHERS

chenmh localhost=(root) NOPASSWORD:ALL

chenmh ALL=(ALL)    NOPASSWD: /bin/mkdir test

%dev ALL=(ALL)    NOPASSWD:/sbin/shutdown

User chenmh may run the following commands on this host:    (root) NOPASSWD: /bin/mkdir, /bin/rm