Changes
Added part for TexLive under Lin/Win/Mac
EnableWrite18=t
into it. An alternative is to se the environment variable <code>MIKTEX_ENABLEWRITE18=t</code>.
=== Windows/Linux/Mac - TexLive ===
'''TexLive 2008'''
Open the file 'path to TexLive'/texmf/web2c/texmf.cnf and search in the file for the following passage:
% Enable system commands via \write18{...}? Obviously insecure, despite
% being so useful.
shell_escape = f
change here the option from false to true so that the last line above looks like
shell_escape = t
After that you just have to recompile your formats. That is done by
texexec --make --all
or/and
texexec --make --all cont-xx
where xx stands for your needed countrycode.
Additionally if you're using MK IV already you have to do the following steps afterwards to get a running environment:
luatools --generate
context --make --all
context --make --all cont-xx
after that write18 sould be enabled and you sould be able to use it.
=== Linux/Mac ===