Category Archives: Uncategorized

Install Google Chrome on Debian Jessie

Download a DEB file for the version of Chrome you want from here. Then

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Installing HipChat on Debian Jessie

I simply download HipChat from the official repository and follow the installation instruction there, but when I launch the application, I get the following error: The program gets stuck there until it is killed. It is not elegant, but HipChat … Continue reading

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Installing Hadoop-LZO on Debian Jessie

JDK 1.6 or later is need to be already installed for this to work. Install a few packages: To see where the LZO library is installed, get a list of files installed: In my box, the include and library paths … Continue reading

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Installing Adobe Reader on Debian/Jessie

Once in a while you need to deal with fancier PDF files which may allow you to type in using forms, but Linux applications like Okular might not be fully capable of handling Adobe’s proprietary features. In such an unfortunate … Continue reading

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Using Tor on Debian Jessie

Install the package and start the service: Check to see if Tor is running: You should see an entry for Tor. To simply use this, manually specify SOCKS proxy configuration with localhost:9050. Visit a site like showip.net to check what … Continue reading

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Using NTP Server to Synchronize Time on Debian Jessie

For just one time synchronization, it is easy: The server to use can be specified from the list given here.

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Installing MongoDB on Debian Jessie

On Debian, it is of course easy to install: My main use of local database servers is for testing, however, and I don’t want MongoDB to take up more than a few GB under /var/lib for journal files. I can … Continue reading

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Installing PyData Stack on Debian Jessie

Installing NumPy, SciPy, and Matplotlib has gotten so much easier with PIP, but there are some dependencies that are not taken care of automatically. NumPy: SciPy: Matplotlib: I had some issue with sudo when the installer could not find X. … Continue reading

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Installing PostgreSQL on Debian Jessie

where yourusername is the username of your account. Note that with the -s switch the user will be created as a superuser. For assigning a more restricted role, see the official documentation. Go back to your normal user account, and … Continue reading

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Interpreting A/B Test using Python

Suppose we ran an A/B test with two different versions of a web page, and , for which we count the number of visitors and whether they convert or not. We can summarize this in a contingency table showing the … Continue reading

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