该死的crontab环境变量问题

test.sh脚本如下：
#!/bin/sh
sqlplus /nolog<
    whenever sqlerror exit 20;
    whenever oserror exit 20;
    connect hxl/hxl;
    variable cnt number;
    begin
    select Count(1) into :cnt from dual;
    if :cnt = 0 then
     :cnt:=0;
    else
     :cnt:=99;
    end if;
    end;
/
exit :cnt
ENDOFINPUT
flag=$?
echo $flag


手工执行没有问题
[etl@node1 shell]$ ./test.sh


SQL*Plus: Release 11.2.0.3.0 Production on Fri Mar 7 11:29:19 2014


Copyright (c) 1982, 2011, Oracle.  All rights reserved.


SQL> SQL> SQL> Connected.
SQL> SQL>   2    3    4    5    6    7    8    9  
PL/SQL procedure successfully completed.


SQL> Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options
99
[etl@node1 shell]$ 


crontab内容如下:
[etl@node1 log]$ crontab -l
20 11 * * * /home/etl/shell/test.sh >>$HOME/log/output_test.log 2>&1






crontab中执行死活不了
[etl@node1 log]$ more output_test.log 
/home/etl/shell/test.sh: line 2: sqlplus: command not found
127




怀疑是环境变量问题,将如下两句添加到脚本中,问题解决.
. /etc/profile
. ~/.bash_profile

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