在Linux上，安装完成之后，在测试RMAN时可能会遇到如下错误：
[oracle@smsdbrac1 oracle]$
rman target /
rman: can't open target
这是由于调用的是非Oracle的RMAN的缘故：
[oracle@smsdbrac1 oracle]$
which rman
/usr/X11R6/bin/rman
在X11R6下存在一个名为rman的命令：
[oracle@smsdbrac1 bin]$
./rman -help
rman
[-f
]
[-S(ource of man page passed in)] [-F(ormatted man page passed in)]
[-r ] [-l ]<br />
[-V(olume) <colon-separated list>] [-U(RLs as hyperlinks)]<br />
[-b (show subsections)] [-k(eep head/foot)]<br />
[-n(ame of man page) <string>] [-s(ection) <string>]<br />
[-p(aragraph mode toggle)] [-t(abstops spacing) <number>]<br />
[-N(ormalize spacing, changebars)] [-y (zap hyphens toggle)]<br />
[-K (declare that page has no breaks)]<br />
[-d(iff) <file> (diff of old page source to incorporate)]<br />
[-M(essage) <text> (included verbatim at end of Name section)]<br />
[-R(ebus words for TkMan)] [-C (enable Tcl/Tk formatting)]<br />
[-o (no op)] [-O <arg> (no op with arg)]<br />
[-q(uiet--don't report warnings)] [-h(elp)] [-v(ersion)]<br />
[<filename>]<br />
<br />
<br />
<br />
修正这个问题，我们只需要在Oracle用户的环境变量下，将$ORACLE_HOME/bin放在PATH变量前就可以了：<br />
<span style="color:#003399;"><strong>export PATH=$ORACLE_HOME/bin:${PATH}:/usr/bin:/bin:/usr/bin/X11:/usr/local/bin</strong></span><br />
<br />
<br />
重新登录使环境变量生效，现在Oracle能找到正确的rman了：<br />
[oracle@smsdbrac1 oracle]$ <span style="color:#003399;"><strong>su - oracle</strong></span><br />
Password: <br />
[oracle@smsdbrac1 oracle]$ <span style="color:#003399;"><strong>which rman</strong></span><br />
~/product/10.2.0/db/bin/rman<br />
<br />
<strong><span style="color:#FF9900;">接下来去登陆一下，看看成功了没有？<img src="http://blog.chinaunix.net/kindeditor/plugins/emoticons/images/0.gif" border="0" alt="" /></span></strong><br />
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