Installation of Oracle 10g in Linux environment error permission to write to the inventory location

As for some errors that occur during the installation process, I summarize that the path does not have permissions, not the user group below the
To create Oracle users and user groups and directories, and to assign permissions to the directory, refer to the following example:
This place can be successfully installed if you simply follow the procedure below, but if you want to install Oracle in a different directory,
Need to be modified, this is simply to build Oracle in the root directory, and then install Oracle in this directory,
If you want to install Oracle under OPT, you need to make simple modifications.
#groupadd Oinstall
#groupadd DBA
#groupadd Oper
#useradd-G oinstall-g dba Oracle
#passwd Oracle
#mkdir/oracle (if you want to install Oracle under OPT, that's mkdir/opt/oracle, then modify the permissions below)
#chown-R oracle:oinstall/oracle (Chown-r oracle:oinstall/opt/oracle)
#chmod-R 775/oracle (Chmod-r 775/opt/oracle)

Installation of Oracle 10g in Linux environment error permission to write to the inventory location