五、为了安全要求每次执行shell都手工输入密码
$ vi test5.sh
#!/bin/bash
echo -n "Enter password for u_test:"
read PASSWD
sqlplus -S /nolog <<EOF
conn u_test/$PASSWD
select * from tab;
exit
EOF
$ chmod +x test5.sh
$ ./test5.sh
六、为了安全从文件读取密码
对密码文件设置权限, 只有用户自己才能读写.
$ echo 'iamwangnc' > u_test.txt
$ chmod g-rwx,o-rwx u_test.txt
$ vi test6.sh
#!/bin/bash
PASSWD=`cat u_test.txt`
sqlplus -S /nolog <<EOF
conn u_test/$PASSWD
select * from tab;
exit
EOF
$ chmod +x test6.sh
$ ./test6.sh
http://blog.sina.com.cn/s/blog_87fad56a0100yjpp.html
http://blog.sina.com.cn/s/blog_8333cf8f0100z7e3.html
http://www.cnblogs.com/softwaretesting/archive/2012/02/06/2339671.html