问题：使用db2 connect to 数据库报：DB2 SQL Error: SQLCODE=-30082, SQLSTATE=08001, ROOT CAPABILITY REQUIRED
原因是：我在/home/db2inst1/下上传一个文件，然后chmod -R 777 /home导致的
解决方法：/home/db2inst1/sqllib/security目录下，db2chpw、db2ckpw两个文件的所属用户修改为root。权限修改为：4511。
步骤：root:/#cd /home
root:/home#cd db2inst1
root:/home/db2inst1#cd sqllib
root:/home/db2inst1/sqllib#cd security
root:/home/db2inst1/sqllib/security#ls -l
total 8064
drwxr-xr-x 2 db2inst1 db2iadm1 256 Feb 25 17:44 auditdata
-r-s--x--x 1 db2inst1 db2iadm1 34966 Feb 25 17:44 db2aud
-rw-r--r-- 1 db2inst1 db2iadm1 4096 Feb 25 17:44 db2audit.cfg
lrwxrwxrwx 1 root system 37 Feb 25 17:44 db2chkau -> /opt/IBM/db2/V9.7/security64/db2chkau
-r-s--x--x 1 db2inst1 db2iadm1 23872 Feb 25 17:44 db2chpw
-r-s--x--x 1 db2inst1 db2iadm1 4015551 Feb 25 17:44 db2ckpw
-r-x--s--x 1 db2inst1 db2iadm1 43592 Feb 25 17:44 db2flacc
root:/home/db2inst1/sqllib/security#chown root db2chpw
root:/home/db2inst1/sqllib/security#chown root db2ckpw
root:/home/db2inst1/sqllib/security#chmod 4511 db2chpw
root:/home/db2inst1/sqllib/security#chmod 4511 db2ckpw
root:/home/db2inst1/sqllib/security#su - db2inst1
$ pwd
/home/db2inst1
$ db2stop
03/18/2013 16:25:20 0 0 SQL1064N DB2STOP processing was successful.
SQL1064N DB2STOP processing was successful.
$
$ db2start
03/18/2013 16:25:29 0 0 SQL1063N DB2START processing was successful.
SQL1063N DB2START processing was successful.