数据库安装以后，db2报错如下：
If ‘db2‘ is not a typo you can run the following command to lookup the package that contains the binary:
command-not-found db2
bash: db2: command not found
问题处理：
①首先编辑/etc/profile
vim /etc/profile
②然后在该文件最后一行添加
PATH=$PATH:/opt/ibm/db2/V10.1_01/bin:/home/db2inst1/sqllib/bin:/home/db2inst1/sqllib/adm:/home/db2inst1/sqllib/misc
export PATH
③使用source命令让更改配置生效
source /etc/profile
原文：https://www.cnblogs.com/OliverQin/p/9276775.html