Tips for ABINIT users and developers

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====== Conventions and formatting ======

===== General conventions =====

In this wiki, we use //italic fonts// to represent software components, options, and files, e.g. the //configure// script, the //with_mpi// option, or the //src/21_hashfuncs%%/%%// directory. Commands entered by the user are usually wrapped in frames and use a fixed-space font, as follows:
<code>../configure --enable-openmp --with-mpi="/usr/local"</code>

The //~abinit// keyword represents the top source directory of Abinit wherever it appears.

<WRAP tip>To be found more easily, tips, tricks, advice, and notes, are written in yellow boxes with a light bulb on their left-hand side.</WRAP>

<WRAP important>**IMPORTANT** \\ Essential information that you should read with good care is displayed in orange boxes with a warning sign on the left-hand side.</WRAP>

===== Interactive shell commands =====

Many examples described on this wiki assume that the user is using a [[wp>Terminal_emulator|terminal]] to interact with Abinit. A terminal is a text window running a [[wp>Shell_(computing)|shell]], which is a program executing commands entered by the user. Please click on the links within this section, look at your operating system documentation, and/or look on internet for "Opening a terminal" if you are not familiar with terminals and shells.

When describing interactive shell commands, we use the [[wp>Bourne_shell|Bourne Shell]] conventions, since this is the most portable shell available and it is the one used by various components of Abinit. All commands entered by the user start with a dollar sign and a space character -- which should not be typed when you reproduce the examples on your own computer -- and their output is reproduced verbatim just below. In the following example:
<code>
$ cat abinit.in
ecut 12.0
znucl 1
acell 1.0 1.0 1.0
xred 0.0 0.0 0.0
...
</code>
the user types ''%%'%%cat abinit.in%%'%%'' followed by the enter key, which displays the contents of the //abinit.in// file on the console.