chown错误，尝试使用Ruby 2.0.0在Mavericks中安装rbenv

Question

Trying to install rbenv.

1. Checked to See brew update

Started with:

$ brew update    

then got:

fatal: Not a git repository (or any of the parent directories): .git

So then I did:

$ git init brew update  

and got:

usage: git init [-q | --quiet] [--bare] [--template=] [--shared[=]] [directory]

which i assume means it worked.

2. Tried Installing rbenv

Next I did:

 $ brew install rbenv  

And got this:

==> Downloading https://github.com/sstephenson/rbenv/archive/v0.4.0.tar.gz

################################################################## 100.0%

==> Caveats
To use Homebrew's directories rather than ~/.rbenv add to your profile:
export RBENV_ROOT=/usr/local/var/rbenv

To enable shims and autocompletion add to your profile:
if which rbenv > /dev/null; then eval "$(rbenv init -)"; fi
Warning: Could not link rbenv. Unlinking...
Error: The brew link step did not complete successfully
The formula built, but is not symlinked into /usr/local
You can try again using `brew link rbenv'

Possible conflicting files are:
==> Summary
🍺 /usr/local/Cellar/rbenv/0.4.0: 31 files, 152K, built in 2 seconds

3. So I tried to Link rbenv

Tried to link rbenv:

$ brew link rbenv  

And got this message:

Linking /usr/local/Cellar/rbenv/0.4.0... Warning: Could not link rbenv. Unlinking...

Error: Could not symlink file: /usr/local/Cellar/rbenv/0.4.0
/usr/local/Library/LinkedKegs is not writable. You should change its permissions.

4. Finally, tried to change ownership

Finally I tried to chown to change permission:

$ chown -R s****i /usr/local/Library/LinkedKegs  

And got these messages:

chown: /usr/local/Library/LinkedKegs/apple-gcc42: Operation not permitted
chown: /usr/local/Library/LinkedKegs/autoconf: Operation not permitted
chown: /usr/local/Library/LinkedKegs/automake: Operation not permitted
chown: /usr/local/Library/LinkedKegs/git: Operation not permitted
chown: /usr/local/Library/LinkedKegs/libgpg-error: Operation not permitted
chown: /usr/local/Library/LinkedKegs/libksba: Operation not permitted
chown: /usr/local/Library/LinkedKegs/libtool: Operation not permitted
chown: /usr/local/Library/LinkedKegs/libyaml: Operation not permitted
chown: /usr/local/Library/LinkedKegs/pkg-config: Operation not permitted
chown: /usr/local/Library/LinkedKegs: Operation not permitted

Question

I'm (clearly) very new to Terminal, and setting up Ruby. Can someone tell me what I am doing wrong here and how to fix it?

By way of background, I imploded rvm as per the instructions I'm following, and now trying to install rbenv. Not even sure why, but it seems to be the au courant thing to do.

Answer 1

Try to force the ownership change on /usr/local/ but take note of the current owner ( ls -l /usr/local ) in the case of problems: and try chown -R $(whoami) /usr/local (append with sudo ) to elevate the command as an admin if this doesn't work [nb. -R will run the ownership change recursively]. Then try brew link rbenv again.