今天调试一个RMAN 的备份脚本，这个脚本以前也用过很多次，并没有什么问题，今天执行时，就是过不去。
操作系统：Redhat 5.8
数据库：11.2.0.3
错误如下：
RMAN-00571:===========================================================
RMAN-00569: =============== ERROR MESSAGESTACK FOLLOWS ===============
RMAN-00571:===========================================================
RMAN-00552: syntax error in command linearguments
RMAN-01009: syntax error:found "dot": expecting one of: "double-quoted-string,identifier, single-quoted-string, "
RMAN-01007: at line 2 column 1 file:command line arguments
这个错误，提示在第二行有问题。
根据MOS 文档[ID427224.1]的说明：
How to check for correct RMAN syntax [ID427224.1]
我们也可以使用rman checksyntax 命令检查RMAN 脚本的语法问题。
如下：
[oracle@rac1 scripts]$ rman checksyntaxrman.sh
Argument Value Description
-----------------------------------------
target quoted-string connect-string fortarget database
catalog quoted-string connect-string forrecovery catalog
nocatalog none if specified, thenno recovery catalog
cmdfile quoted-string name of inputcommand file
log quoted-string name of outputmessage log file
trace quoted-string name of outputdebugging message log file
append none if specified, logis opened in append mode
debug optional-args activate debugging
msgno none show RMAN-nnnnprefix for all messages
send quoted-string send a command tothe media manager
pipe string building block forpipe names
timeout integer number of secondsto wait for pipe input
checksyntax none check the commandfile for syntax errors
-----------------------------------------
Both single and double quotes (' or ")are accepted for a quoted-string.
Quotes are not required unless the stringcontains embedded white-space.
RMAN-00571:===========================================================
RMAN-00569: =============== ERROR MESSAGESTACK FOLLOWS ===============
RMAN-00571:===========================================================
RMAN-00552: syntax error in command linearguments
RMAN-01009: syntax error: found"rman": expecting one of: "append, auxiliary, catalog,checksyntax, cmdfile, log, msgno, nocatalog, pipe, script, send, target,timeout, using, @, ;"
RMAN-01007: at line 2 column 1 file:command line arguments
RMAN 脚本的开始一段内容如下：
#!/bin/ksh
export LANG=en_US
BACKUP_DATE=`date +%d`
RMAN_LOG_FILE=${0}.out
TODAY=`date`
USER=`id|cut -d "(" -f2|cut -d")" -f1`
echo"-----------------$TODAY-------------------">$RMAN_LOG_FILE
ORACLE_HOME=/u01/app/oracle/11.2.0/db_1
export ORACLE_HOME
RMAN=$ORACLE_HOME/bin/rman
export RMAN
错误提示的第二行也只是一个大概范围，我们这里报错，是因为$RMAN_LOG_FILE变量来自shell变量$0，使用了相对路径，而有些版本rman不支持相对路径，因此执行时报错。
解决方法是给$RMAN_LOG_FILE予绝对路径：
将：
RMAN_LOG_FILE=${0}.out
修改成：
RMAN_LOG_FILE=`pwd`/${0}.out
再次执行就ok了。
