title: bash fork error (Resource temporarily unavailable) does not stop, and keeps showing up every time I try to kill/reboot
body: <p>I mistakenly used a limited server as an iperf server for 5000 parallel connections. (limit is 1024 processes)
  Now every time I log in, I see this:</p>
  
  <pre><code>-bash: fork: retry: Resource temporarily unavailable
  -bash: fork: retry: Resource temporarily unavailable
  -bash: fork: retry: Resource temporarily unavailable
  -bash: fork: retry: Resource temporarily unavailable
  -bash: fork: Resource temporarily unavailable
  </code></pre>
  
  <p>Then, I try to kill them, but when I do ps, I get this:</p>
  
  <pre><code>-bash-4.1$ ps
  -bash: fork: retry: Resource temporarily unavailable
  -bash: fork: retry: Resource temporarily unavailable
  -bash: fork: retry: Resource temporarily unavailable
  -bash: fork: retry: Resource temporarily unavailable
  -bash: fork: Resource temporarily unavailable
  </code></pre>
  
  <p>Same happens when I do a killall or similar things. 
  I have even tried to reboot the system but again this is what I get after reboot:</p>
  
  <pre><code>-bash-4.1$ sudo reboot
  -bash: fork: retry: Resource temporarily unavailable
  -bash: fork: retry: Resource temporarily unavailable
  -bash: fork: retry: Resource temporarily unavailable
  -bash: fork: retry: Resource temporarily unavailable
  -bash: fork: Resource temporarily unavailable
  -bash-4.1$ 
  </code></pre>
  
  <p>So Basically I cannot do anything. all the commands get this error :/
  I can, however, do "exit".</p>
  
  <p>This is an off-site server that I do not have physical access to, so I cannot turn it off/on physically.</p>
  
  <p>Any ideas how I can fix this problem? I highly appreciate any help.</p>