Trying to install ruby on rails

Question

I'm tryng to install rails with gem install rails but when I try that I get

ERROR: While executing gem... (Gem::FilePermissionError) You don't have write permissions for the /Library/Ruby/Gems/2.6.0 directory.

So I tried using sudo gem install rails and I get

ERROR:  Error installing rails:
ERROR: Failed to build gem native extension.

I've checked on the internet and it says I should install RVM but when I try to do that it tells me:

Error running './configure --prefix=/Users/manhattan/.rvm/rubies/ruby-2.7.0 --with-opt-dir=/usr/local/opt/libyaml:/usr/local/opt/libksba:/usr/local/opt/readline:/usr/local/opt/zlib:/usr/local/opt/openssl@1.1 --disable-install-doc --enable-shared', please read /Users/manhattan/.rvm/log/1589107425_ruby-2.7.0/configure.log There has been an error while running configure. Halting the installation.

Could someone help me please.

Answer 1

you can change the permission of the directory you are working on

# chmod -R 777 DIR_NAME
# cd DIR_NAME
# gem install rails

Answer 2

Installing Ruby gems (like Rails) on a Mac is a common source of confusion and frustration. Unfortunately, most solutions are incomplete, outdated, and provide bad advice. You should never need to use sudo or change permissions.

There are 5 steps to a working Ruby setup, which I've written about in a lot of detail in my definitive guide to installing Ruby gems on a Mac . It explains why you are getting these errors, compares the various solutions, why some are better than others, and why you shouldn't use sudo .

TL;DR: Use a battle-tested and reliable automated script that will set everything up for you: https://github.com/monfresh/laptop