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When I run 'passenger-memory-stats' on my ubuntu server as root I get the following error : 

-bash: passenger-memory-stats: command not found

If I run this command as a user ('deploy' in my case) I get the passenger results but I get the following warning:

*** WARNING: Please run this tool as root. Otherwise the private dirty RSS of processes cannot be determined.

So what I need to know is how can I get 'passenger-memory-stats' to run as root. Any pointers would be greatly appreciated.

* ERROR MESSAGE *

/home/deploy/.rvm/rubies/ruby-1.9.2   p290/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:247:in `to_specs': Could not find   passenger (>= 0) amongst [minitest-1.6.0, rake-0.8.7, rdoc-2.5.8] (Gem::LoadError)
from /home/deploy/.rvm/rubies/ruby-1.9.2- p290/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:256:in `to_spec'
from /home/deploy/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems.rb:1208:in `gem'
from /home/deploy/.rvm/gems/ruby-1.9.2-p290/bin/passenger-memory-stats:18:in `<main>'
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2 Answers 2

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You can determine the full path of an executable file using the command:

$ which passenger-memory-stats

You need to make sure the root PATH includes the path to this executable to be able to execute it. Otherwise, you need to provide the full path to the executable when you want to execute it such as:

$ sudo /path/to/passenger-memory-stats
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  • When I do 'which passenger-memory-stats' nothing is shown. Am I missing something for 'which' to work?
    – Peter
    Jan 25, 2012 at 11:56
  • If you have done this as root, this explain why you can not execute it. If so, try it again as normal user and search for the returned path in root PATH environment variable.
    – Khaled
    Jan 25, 2012 at 12:02
  • this is what I get from a normal user: which passenger-memory-stats /home/deploy/.rvm/gems/ruby-1.9.2-p290/bin/passenger-memory-stats . If I do 'sudo /home/deploy/.rvm/gems/ruby-1.9.2-p290/bin/passenger-memory-stats' it will error. I've updated my original post with the error message. Seems odd it can't find passenger when I know its installed :S
    – Peter
    Jan 25, 2012 at 12:16
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In the end I just re-installed ruby and passenger and now everything seems to be working fine. Not sure what I did last time?

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