Create a PDF file from several JPEG files

linux

To create a PDF file from several JPEG files, use convert command, from imagemagick package:

convert *.jpg resultingFile.pdf

Testing communication over SSL

linux

To test communication over SSL, for instance to debug a protocol stack or to check configuration of a server (or even a client), use openssl:

openssl s_client -connect <server>:<port>

Test servers

When developing client / server applications, it's often useful to be able to test each side on its own. It's even more useful when one of the two sides doesn't provide any log capability.

This article provides very simple test servers implemented in Python, aimed at helping client development.

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