NFS網絡文件共享服務，一般用來linux之間共享資源
[root@node2 ~]# mkdir /nfs_orabak
[root@node2 ~]# cd /nfs_share/
[root@node2 nfs_share]# echo sssss >r.test
[root@node2 nfs_share]# ls
r.test
[root@node2 nfs_share]# cd /nfs_orabak/
[root@node2 nfs_orabak]# echo ssss >rw.test
[root@node2 nfs_orabak]# ls
rw.test
[root@node2 ~]# vim /etc/exports
/nfs_orabak 192.168.100.11/24(rw,no_root_squash)
/nfs_share *
第一行代表只允許客戶端192.168.100.11掛載，並且擁有讀寫權限
第二行的代表允許所有客戶端訪問，默認權限是只讀
參數no_root_squash 其作用是：登入 NFS 主機使用分享目錄的使用者，如果是 root 的話，那麼對於這個分享的目錄來說，他就具有root 的權限。默認情況使用的是相反參數root_squash：在登入 NFS 主機使用分享之目錄的使用者如果是 root 時，那麼這個使用者的權限將被壓縮成為匿名使用者，通常他的UID 與 GID 都會變成 nobody 那個身份。
[root@node2 ~]# /etc/init.d/iptables stop
[root@node2 ~]# /etc/init.d/ip6tables stop
[root@node2 ~]# chkconfig iptables off
[root@node2 ~]# chkconfig ip6tables off
[root@node2 ~]# chkconfig --list iptables
iptables 0:關閉 1:關閉 2:關閉 3:關閉 4:關閉 5:關閉 6:關閉
[root@node2 ~]# chkconfig --list ip6tables
ip6tables 0:關閉 1:關閉 2:關閉 3:關閉 4:關閉 5:關閉 6:關閉
[root@node2 ~]# service nfs start
啟動 NFS 服務： exportfs: No options for /nfs_share *: suggest *(sync) to avoid warning
[確定]
關掉 NFS 配額： [確定]
啟動 NFS 守護進程： [確定]
啟動 NFS mountd： [確定]
[root@node2 ~]#
上面的提示表示/nfs_share那行表示，建議添加（sync）同步的參數
[root@node2 ~]# chkconfig --level 35 nfs on
[root@node2 ~]# chkconfig --list nfs
nfs 0:關閉 1:關閉 2:關閉 3:啟用 4:關閉 5:啟用 6:關閉
[root@node1 ~]# showmount -e 192.168.100.12
Export list for 192.168.100.12:
/nfs_share *
/nfs_orabak 192.168.100.11/24
[root@node1 ~]# rpcinfo -p 192.168.100.12
程序 版本 協議 端口
100000 2 tcp 111 portmapper
100000 2 udp 111 portmapper
100024 1 udp 621 status
100024 1 tcp 624 status
100011 1 udp 878 rquotad
100011 2 udp 878 rquotad
100011 1 tcp 881 rquotad
100011 2 tcp 881 rquotad
100003 2 udp 2049 nfs
100003 3 udp 2049 nfs
100003 4 udp 2049 nfs
100021 1 udp 25200 nlockmgr
100021 3 udp 25200 nlockmgr
100021 4 udp 25200 nlockmgr
100003 2 tcp 2049 nfs
100003 3 tcp 2049 nfs
100003 4 tcp 2049 nfs
100021 1 tcp 20385 nlockmgr
100021 3 tcp 20385 nlockmgr
100021 4 tcp 20385 nlockmgr
100005 1 udp 892 mountd
100005 1 tcp 895 mountd
100005 2 udp 892 mountd
100005 2 tcp 895 mountd
100005 3 udp 892 mountd
100005 3 tcp 895 mountd
[root@node1 ~]# mount 192.168.100.12:/nfs_share /node2_nfs
[root@node1 ~]# mount 192.168.100.12:/nfs_orabak /node2_orabak
[root@node1 ~]# df -Th
文件系統 類型 容量 已用 可用 已用% 掛載點
/dev/sda3 ext3 93G 10G 79G 12% /
/dev/sda1 ext3 190M 12M 169M 7% /boot
tmpfs tmpfs 2.0G 792M 1.3G 39% /dev/shm
192.168.100.12:/nfs_share
nfs 93G 7.0G 82G 8% /node2_nfs
192.168.100.12:/nfs_orabak
nfs 93G 7.0G 82G 8% /node2_orabak
如果需要開機掛載：
vim /etc/fstab 添加如下內容
192.168.100.12:/nfs_share /node2_nfs nfs defaults 0 0
192.168.100.12:/nfs_orabak /node2_orabak nfs defaults 0 0
-bash: a.txt: 只讀文件系統
[root@node1 node2_nfs]# ll
總計 4
-rw-r--r-- 1 root root 6 05-07 22:26 r.test
[root@node1 node2_nfs]# cat r.test
sssss
[root@node1 node2_nfs]# cd /node2_orabak/
[root@node1 node2_orabak]# echo aaa >>a.txt
[root@node1 node2_orabak]# ll
總計 8
-rw-r--r-- 1 root root 4 05-07 22:29 a.txt
-rw-r--r-- 1 root root 5 05-07 22:27 rw.test
[root@node1 node2_orabak]# cat rw.test
ssss
下面是oracle導出測試：
[root@node1 node2_orabak]# su - oracle
[oracle@node1 ~]$ exp \'/ as sysdba\' file=/node2_orabak/scott.dmp log=/node2_orabak/scott.log owner=scott
Export: Release 11.2.0.1.0 - Production on Sat May 7 22:32:05 2016
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
EXP-00028: failed to open /node2_orabak/scott.log for write
EXP-00000: Export terminated unsuccessfully
[oracle@node1 ~]$ exit
[root@node1 node2_orabak]# chown -R oracle:oinstall /node2_orabak/
[root@node1 node2_orabak]# su - oracle
[oracle@node1 ~]$ exp \'/ as sysdba\' file=/node2_orabak/scott.dmp log=/node2_orabak/scott.log owner=scott
Export: Release 11.2.0.1.0 - Production on Sat May 7 22:35:09 2016
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Export done in AL32UTF8 character set and AL16UTF16 NCHAR character set
server uses ZHS16GBK character set (possible charset conversion)
About to export specified users ...
. exporting pre-schema procedural objects and actions
. exporting foreign function library names for user SCOTT
. exporting PUBLIC type synonyms
. exporting private type synonyms
. exporting object type definitions for user SCOTT
About to export SCOTT's objects ...
. exporting database links
. exporting sequence numbers
. exporting cluster definitions
. about to export SCOTT's tables via Conventional Path ...
. . exporting table DEPT 4 rows exported
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
. . exporting table EMP 14 rows exported
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
. . exporting table SALGRADE 5 rows exported
EXP-00091: Exporting questionable statistics.
. exporting synonyms
. exporting views
. exporting stored procedures
. exporting operators
. exporting referential integrity constraints
. exporting triggers
. exporting indextypes
. exporting bitmap, functional and extensible indexes
. exporting posttables actions
. exporting materialized views
. exporting snapshot logs
. exporting job queues
. exporting refresh groups and children
. exporting dimensions
. exporting post-schema procedural objects and actions
. exporting statistics
Export terminated successfully with warnings.
[root@node2 nfs_orabak]# ll -h
總計 36K
-rw-r--r-- 1 oracle oinstall 4 05-07 22:29 a.txt
-rw-r--r-- 1 oracle oinstall 5 05-07 22:27 rw.test
-rw-r--r-- 1 oracle oinstall 24K 05-07 22:35 scott.dmp
-rw-r--r-- 1 oracle oinstall 1.8K 05-07 22:35 scott.log
[root@node2 nfs_orabak]# cat rw.test
ssss