前言

结论

   1,sudo可以在非ROOT用户执行ROOT权限，其执行形式：
     [oracle@seconary ~]$ sudo  mount /dev/sdb1 /oradata
   2,不配置SUDO相关配置文件/etc/sudoers，运行sudo会报oracle is not in the sudoers file.  This incident will be reported.
   3，在配置文件添加oracle          ALL=(ALL)        ALL，虽可以在非ROOT用户执行ROOT权限，但仍要输入ROOT密码
   4，在配置文件添加oracle         ALL=(ALL)        NOPASSWD: ALL，不用输入ROOT密码，即可在非ROOT用户执行ROOT权限
   5, 以上适用于redhat 5.4
   6, 在suse 11上，仅首次运行sudo要输入密码，后面不用再输入密码
   7，在suse 11,重启后同6，首次运行SUDO要输入密码，后面不用再输入密码

测试

[oracle@seconary ~]$ more /etc/redhat-release 
Red Hat Enterprise Linux Server release 5.4 (Tikanga)


[oracle@seconary ~]$ sudo  mount 10.0.0.39:/nfs_dir /nfs_client


oracle is not in the sudoers file.  This incident will be reported.


[root@seconary ~]# cp /etc/sudoers /etc/sudoers.bak
[root@seconary ~]# 


---添加如下内容
[root@seconary ~]# vi /etc/sudoers
oracle          ALL=(ALL)        ALL


[oracle@seconary ~]$ sudo  mount 10.0.0.39:/nfs_dir /nfs_client
Password: 
[oracle@seconary ~]$ 


---添加如下内容
oracle         ALL=(ALL)        NOPASSWD: ALL


---可以在ORACLE用户执行ROOT的MOUNT权限，且不用输入密码即可
[oracle@seconary ~]$ df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                      130G   80G   44G  65% /
/dev/sda1              99M   13M   82M  13% /boot
tmpfs                 2.0G  746M  1.3G  38% /dev/shm
/dev/sdc1              17G   14G  1.9G  89% /11204grid
/dev/sdc2              18G   17G   56M 100% /11204rdbms
10.0.0.39:/nfs_dir     67G   22G   43G  34% /nfs_client
[oracle@seconary ~]$ sudo umount /nfs_client
[oracle@seconary ~]$ df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                      130G   80G   44G  65% /
/dev/sda1              99M   13M   82M  13% /boot
tmpfs                 2.0G  746M  1.3G  38% /dev/shm
/dev/sdc1              17G   14G  1.9G  89% /11204grid
/dev/sdc2              18G   17G   56M 100% /11204rdbms
[oracle@seconary ~]$ 




----经测试在suse 11，仅首次运行sudo要输入ROOT密码，然后不用再输入密码了


oracle@suse11:~> more /etc/issue


Welcome to SUSE Linux Enterprise Server 11 (x86_64) - Kernel \r (\l).


suse11:~ # su - oracle
oracle@suse11:~> sudo mount /dev/sdb1 /oradata


We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:


    #1) Respect the privacy of others.
    #2) Think before you type.
    #3) With great power comes great responsibility.


root's password:
oracle@suse11:~> df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda2              67G   22G   43G  34% /
udev                  1.9G  108K  1.9G   1% /dev
/dev/sdb1             3.0G   69M  2.8G   3% /oradata
oracle@suse11:~> sudo umount /oradata
oracle@suse11:~> df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda2              67G   22G   43G  34% /
udev                  1.9G  108K  1.9G   1% /dev
oracle@suse11:~> 
oracle@suse11:~> 
oracle@suse11:~> 
oracle@suse11:~> df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda2              67G   22G   43G  34% /
udev                  1.9G  108K  1.9G   1% /dev
oracle@suse11:~> sudo mount /dev/sdb1 /oradata
oracle@suse11:~> 


---重启后，同上，首次要输入密码，然后不用再输入密码
suse11:~ # su - oracle
oracle@suse11:~> sudo mount /dev/sdb1 /oradata
root's password:
Sorry, try again.
root's password:
oracle@suse11:~> df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda2              67G   22G   43G  34% /
udev                  1.9G  108K  1.9G   1% /dev
/dev/sdb1             3.0G   69M  2.8G   3% /oradata