Installing 1.9gazebo from source in local directory, error

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Hi Hi Everyone, I have tried to install 1.9Gazebo from source using local directory. Everything went well until the last step, "Setup enviroment variables" I follow the instructions below:

echo "export LD_LIBRARY_PATH=<install_path>/local/lib:$LD_LIBRARY_PATH" >> ~/.bashrc
echo "export PATH=<install_path>/local/bin:$PATH" >> ~/.bashrc
echo "export PKG_CONFIG_PATH=<install_path>/local/lib/pkgconfig:$PKG_CONFIG_PATH" >> ~/.bashrc
source ~/.bashrc

And I got the following error:

bash: install_path: No such file or directory

Then when I run Gazebo ../path$ gazebo I got the error "command not found" I am new on linux so I couldn't figure out yet how to fix this problem This is the second time that installs Gazebo from source. The first time I successfully installed it using the default path (/usr/local) but I failed installing gazeborospack. This why I am reinstalling gazebo for the second time using local directory and see if I could successfully install gazeborospacks . Are there any differences-advantages of installing gazebo from source using the default path or local directory?? Thanks you for your help in this matter