ssh/scp without password

Suppose you have two machines: A and B. A is your work machine, you do most of your work on it. But B is a little special (e.g., connected to some specific hardware) that you need to ssh on it or copy some file from A to B from time to time. Here is the way that you can get rid of entering passwords every time you do ssh/scp.

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Figure Over Two Columns in Latex

You may often find a table or figure is too big to fit into one column when your article has two columns. Use this to insert a figure (same with table) and it will save you:

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Set sty file path of Latex in Linux

From time to time, you may want to compose your own sty files to eliminate long header in your tex file. But it's boring to put you sty file in the same directory of your tex file every time since you really want your sty file to be common, i.e., can be accessed everywhere in your system.

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