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Anchi Cheng, 08/12/2014 02:41 PM

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h2. Add the IP address and matching hostname of the microscope and digital camera computer in your host file on the main Leginon computer, and vice versa.
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h3. Find out what python thinks the hostname is with python command line.  REPEAT this both on Linux and Windows PC
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Run the following in python command line:
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<pre>
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import socket
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socket.gethostname()
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</pre>
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h3. Find out the ip address associated with the hostname
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Run the following in python command line:
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<pre>
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import socket
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socket.gethostbyname('your_host_name')
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</pre>
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h3. Modify your "hosts" file on the linux Leginon computer to include the instrument hosts if the latter is not already mapped by your domain name server
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*  On Linux, this "hosts" file is at
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> /etc/hosts
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Example of a "hosts" file:
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<pre>
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192.000.1.222   instrument_host_name.domain_name instrument_short_host_name
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</pre>
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h3. Use shorter linux hostname if desired
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If you'd like to shorten your linux hostname recognized by socket without the domain name, you may do so as root
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<pre>
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hostname your_shorter_hostname
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</pre>
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and also add that to the /etc/hosts as an alternative name
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<pre>
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192.000.1.333   long_host_name.domain_name your_shorter_hostname
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</pre>
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You will need to restart networking to make it persistent.
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<pre>
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/etc/init.d/network restart
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</pre>
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Test the change by finding the ip address with the hostname as in the above section.
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h3. The Linux main Leginon computer also needs to identify itself by its hostname registered on the instrument Windows computer.
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*  On Window XP and WIndows 7 this host file is
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> C:\\WINDOWS\system32\drivers\etc\hosts
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*  On Window NT, this host file is
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> C:\\WINNT\system32\drivers\etc\hosts