Category Archives: EC2

Installing Scipy on Linux Red Hat

Tried to install scipy using easy_install (also pip). Installation failed with error: Atlas ( libraries not found. Instead: sudo yum install scipy works seamlessly

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Add a new host to known_hosts

This is from serverfault: ssh-keygen -R [hostname] ssh-keygen -R [ip_address] ssh-keygen -R [hostname],[ip_address] ssh-keyscan -H [hostname],[ip_address] >> ~/.ssh/known_hosts ssh-keyscan -H [ip_address] >> ~/.ssh/known_hosts ssh-keyscan -H [hostname] >> ~/.ssh/known_hosts

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Issue with ec2-upload-bundle command from EC2 API

ec2-upload-bundle command uploads an image of an instance to Amazon S3. When I used underscore in the name of the S3 bucket the command gave ec2 v2 error prompting user’s confirmation (entering yes and hitting enter). If ec2-upload-bundle is in … Continue reading

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Sudo command changes environment variables

When you run sudo command it switches user to “supper user” and environment variables also change. This can be annoying. For example, on amazon free-tier micro instance you ssh to it as ec2-user but often (almost always I would say) … Continue reading

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Installing Mercurial and Vim on EC2

Pre-installed vim on EC2 does not have clipboard support. Installing from source. First, installing mercurial: sudo yum install mercurial Then clone vim: sudo hg clone vim cd vim/src sudo ./configure –with-features=huge –enable-gui=gnome2 sudo make …bunch of “make” messages follow… … Continue reading

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SciPy complains about libstdc++6 library

Issue solved by downloading, unzipping and copying the “*” file from into /home/ec2-user/local/gcc-4.3/lib64

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Installing SciPy for Python on Amazon-linux-EC2

First, install pip, a package-manager for python: wget tar -xvf pip*.gz cd pip* sudo python install Install atlas-devel and lapack libraries: yum -y install atlas-devel yum install lapack pip install scipy For the last three lines thanks to … Continue reading

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