安装rbenv，权限被拒绝

Question

I am setting up my VPS to deploy my rails app, but permission denied error keeps happening on my server side. I had to reinstall perl and curl, and now I'm getting the following:

deployer@max:~$ rbenv bootstrap-ubuntu-12-04
bash: /usr/bin/python: permission denied

I tried reinstalling python but came up with no success. How should I solve it?

Update:

root@max:/home/deployer# cd /usr
root@max:/usr# cd bin
root@max:/usr/bin# cd python
bash: cd: python: not a directory

Does this mean python is not installed correctly?

Update:

deployer@max:~$ ls -l 'which python'
total 0
deployer@max:~$ python
bash: /usr/bin/python: permission denied

I thought this meant python was not installed correctly, so I computed the following

deployer@d:~$ su root
root@d:/home/deployer# apt-get install python
python package is already the latest version

So I failed to find the solution yet.

Answer 1

As it turned out it was a permissions issue, here are some general tips on how to debug a permission denied error when trying to execute a binary, python in this case:

ls -l `which python` - tries to retrieve full path and permissions, like -rwxr-xr-x 1 nobody nobody 9644 2012-12-02 13:15 /tmp/env/bin/python

Has to be run as a privileged user if permissions are 0000 , for example.

sudo chmod 0755 /usr/bin/python usually helps.