While I'm all for downvoting the grandparent, I'd say reading the installer script is wise even if you trust the source. Developers aren't good at shell, much

While I'm all for downvoting the grandparent, I'd say reading the installer script is wise even if you trust the source. Developers aren't good at shell, much less portable shell, and such scripts are usually far inferior in quality to the main application code (written in pretty much anything that's not shell). Since an installer typically manipulates privileged locations on your system it's also playing with fire. Taking few minutes to establish whether it was written competently can save a lot of pain down the road!