Fail to install drush via pear I try to install drush using the following command:   

pear install drush/drush


I get this error message:


  No releases available for package "pear.drush.org/drush" install failed.


Then I try with sudo:

sudo install drush/drush


I get this error message:


  downloading drush-5.4.0.tgz …
  Starting to download drush-5.4.0.tgz (398,652 bytes) done: 398,652 bytes
  Could not rename /usr/bin/.tmpdrush to /usr/bin/drush copy(/usr/bin/drush): failed to open stream: No such file or directory
  ERROR: commit failed.


I installed pear, and added the pear.drush.org channel. What is wrong?



I realize that my question was not very clear. I was trying  to install drush using pear on OSX Mountain Lion and I got those errors. Anyway I managed to accomplish my task another way, by installing "homebrew" package manager and following a few steps from this tutorial (step 8 and 9). 

Update: an even simpler way to install drush using homebrew:

brew install drush


That's it.
Use the following commands:

sudo rm /usr/bin/drush
sudo pear install drush/drush
sudo drush --version