RHEL中sudo的問題

Gchaeg

    在學(xué)習(xí)Linux系統(tǒng)過程中（我是依據(jù)鳥哥私房菜）看到默認情況下下sudo命令只能對root用戶有用�？墒俏以跊]有修改任何配置文件的情況下普通用戶也可以使用sudo命令的，不知道是什么原因?qū)е碌�，還忘群內(nèi)高手給予釋疑，謝謝。
   系統(tǒng)為RHEL 6.2 ，內(nèi)核為：2.6.32-220.el6.i686

/etc/sudoers的默認配置文件：

## 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.

## Host Aliases
## Groups of machines. You may prefer to use hostnames (perhaps using
## wildcards for entire domains) or IP addresses instead.
# Host_Alias     FILESERVERS = fs1, fs2
# Host_Alias     MAILSERVERS = smtp, smtp2

## 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 USERALIAS
# User_Alias ADMINS = jsmith, mikem


## 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

# 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.
#
Defaults    always_set_home

Defaults    env_reset
Defaults    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

## 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

## Allows members of the users group to shutdown this system
# %users  localhost=/sbin/shutdown -h now

## Read drop-in files from /etc/sudoers.d (the # here does not mean a comment)
#includedir /etc/sudoers.d

謝謝！

su8610

只有這一行root        ALL=(ALL)         ALL，沒有其他的了，其他用戶應(yīng)該都用不了sudo，如果執(zhí)行sudo的話，會提示 user not in sudoer list的。

chenyx

沒有配置sudo,應(yīng)該是不行的.
樓主將命令運行的結(jié)果貼一下

swenzhao

你執(zhí)行sudo命令時帶參數(shù)了嗎？

Gchaeg

謝謝各位的解答，由于我的粗心大意才給大家?guī)�來這么多麻煩。
我直接執(zhí)行sudo是會有提示的（我以為會不讓執(zhí)行sudo命令）
而后我又輸入了錯誤的語法，誤以為普通用戶是可以執(zhí)行sudo的，對不起，麻煩各位了，謝謝！
以后學(xué)習(xí)看書的時候我會仔細的。

lbseraph

LZ用普通用戶運行什么命令了？如果是非root也能執(zhí)行的命令。。。還是把你普通用戶運行sudo的完整輸出貼出來看眼吧~

wenhq

樓主你的錯誤能帶來大家更大的疑惑。我看完你的第一個帖子也再懷疑sudo。那么差勁么？
不過ubuntu里的sudo是默認打開的。

chenyx

@wenhqubuntu那個是系統(tǒng)安裝的時候定義的用戶,默認就加到sudo組了,在sudo的配置里面有sudo組的定義,所以默認那個用戶就可以.
你要是再新建一個用戶的話,sudo就不行了

chenyx

@Gchaeg你需要關(guān)注命令的輸出,其實你的那個命令的錯誤輸出已經(jīng)能說明很多問題了

wenhq

回復(fù) 8# chenyx


    en.thanks.