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<CENTER><A HREF = "http://lammps.sandia.gov">LAMMPS WWW Site</A> - <A HREF = "Manual.html">LAMMPS Documentation</A> - <A HREF = "Section_commands.html#comm">LAMMPS Commands</A>
</CENTER>
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<H3>shell command
</H3>
<P><B>Syntax:</B>
</P>
<PRE>shell style args
</PRE>
<UL><LI>style = <I>cd</I> or <I>mkdir</I> or <I>mv</I> or <I>rm</I> or <I>rmdir</I>
<PRE> <I>cd</I> arg = dir
dir = directory to change to
<I>mkdir</I> args = dir1 dir2 ...
dir1,dir2 = one or more directories to create
<I>mv</I> args = old new
old = old filename
new = new filename
<I>rm</I> args = file1 file2 ...
file1,file2 = one or more filenames to delete
<I>rmdir</I> args = dir1 dir2 ...
dir1,dir2 = one or more directories to delete
</PRE>
</UL>
<P><B>Examples:</B>
</P>
<PRE>shell cd sub1
shell cd ..
shell mkdir tmp1 tmp2 tmp3
shell rmdir tmp1
shell mv log.lammps hold/log.1
shell rm TMP/file1 TMP/file2
</PRE>
<P><B>Description:</B>
</P>
<P>Execute a shell command. Only a few simple file-based shell commands
are supported, in Unix-style syntax. With the exception of <I>cd</I>, all
commands are executed by only a single processor, so that
files/directories are not being manipulated by multiple processors.
</P>
<P>The <I>cd</I> style executes the Unix "cd" command to change the working
directory. All subsequent LAMMPS commands that read/write files will
use the new directory. All processors execute this command.
</P>
<P>The <I>mkdir</I> style executes the Unix "mkdir" command to create
one or more directories.
</P>
<P>The <I>mv</I> style executes the Unix "mv" command to rename a file and/or
move it to a new directory.
</P>
<P>The <I>rm</I> style executes the Unix "rm" command to remove one or more
files.
</P>
<P>The <I>rmdir</I> style executes the Unix "rmdir" command to remove one or
more directories. A directory must be empty to be successfully
removed.
</P>
<P><B>Restrictions:</B>
</P>
<P>LAMMPS does not detect errors or print warnings when any of these Unix
commands execute. E.g. if the specified directory does not exist,
executing the <I>cd</I> command will silently not do anything.
</P>
<P><B>Related commands:</B> none
</P>
<P><B>Default:</B> none
</P>
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