安装Ruby 2.1.1时遇到问题

Question

I am trying to update my Ruby version with my rbenv and am having trouble installing 2.1.1. I have followed the instructions carefully but it does not seem to be working for some reason. Please let me know what I am doing wrong.

Installed ruby-2.1.1 to /Users/user/.rbenv/versions/2.1.1  
$ 
$ ruby -v
ruby 2.0.0p247 (2013-06-27 revision 41674) [universal.x86_64-darwin13]
$ rbenv rehash
$ ruby -v
ruby 2.0.0p247 (2013-06-27 revision 41674) [universal.x86_64-darwin13]
$ rbenv global 2.1.1
$ ruby -v
ruby 2.0.0p247 (2013-06-27 revision 41674) [universal.x86_64-darwin13]
$ rbenv global 2.1.1
$ rbenv rehash
$ ruby -v
ruby 2.0.0p247 (2013-06-27 revision 41674) [universal.x86_64-darwin13]
$ rbenv local 2.1.1
$ ruby -v
ruby 2.0.0p247 (2013-06-27 revision 41674) [universal.x86_64-darwin13]
$ rbenv versions
system
* 2.1.1 (set by /Users/user/.ruby-version)
$ rbenv global 2.1.1
$ ruby -v
ruby 2.0.0p247 (2013-06-27 revision 41674) [universal.x86_64-darwin13]
$ 

Any thoughts on what's going on?

not sure if this helps get to the root of the issue..

PATH=usr/local/bin:/urs/local/sbin:/usr/local/mysql/bin:usr/local/bin:/urs/local/sbin:/usr/loca        /mysql/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin
\$ ~/.bash_profile
-bash: /Users/user/.bash_profile: Permission denied
$ ~/.bash_profile
-bash: /Users/user/.bash_profile: Permission denied
$ export PATH="$HOME./rbenv/bin:$PATH"
$ "$(rbenv init -)"
-bash: export PATH="/Users/user/.rbenv/shims:${PATH}"
source "/usr/local/Cellar/rbenv/0.4.0/libexec/../completions/rbenv.bash"
rbenv rehash 2>/dev/null
rbenv() {
typeset command
command="$1"
if [ "$#" -gt 0 ]; then
shift
fi

case "$command" in
rehash|shell)
eval `rbenv "sh-$command" "$@"`;;
*)
command rbenv "$command" "$@";;
esac
}: No such file or directory

Answer 1

Sigh... first, take a close look at your path:

PATH=usr/local/bin:/urs/local/sbin:/usr/local/mysql/bin:usr/local/bin:/urs/local/sbin:/usr/loca        /mysql/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin

You have multiple definitions for the same directories, and, in addition have what are very likely invalid directory names:

• usr/local/bin should be /usr/local/bin . usr/local/bin is a relative directory name, which would usually be invalid anywhere unless you're in your / directory. This is in the path multiple times, so remove all but the middle one and fix the name.
• /urs/local/sbin is probably a misspelled directory /usr/local/sbin , but, at the same time, you probably shouldn't have a .../sbin directory in your path because you'll seldom use the files in there. That particular directory is in your path twice, so remove at least one.
• /usr/loca /mysql/bin is totally invalid so remove it. If you are using MySQL, then fix that entry; It's probably /usr/local/share/mysql/bin , but confirm that and adjust as necessary.

You're using

export PATH="$HOME./rbenv/bin:$PATH"

which is not a valid definition for PATH. $HOME would normally look like /home/user , without a terminating or delimiting / . Using $HOME./rbenv... would result in /home/user./rbenv... which isn't valid.

rbenv needs a chance to initialize when your shell session starts. To do that it expects you to add

export PATH="$HOME/.rbenv/bin:$PATH"
eval "$(rbenv init -)"

to your ~/.bash_profile file as the very last lines. It's obvious that hasn't been done because your path would reflect that if it had. Mine starts with a reference to rbenv's shim, then bin directories.

I have followed the instructions carefully but it does not seem to be working for some reason.

I'd strongly recommend you read the rbenv documentation for setting it up.