====== File Service for UNIX/Linux ======
Storage for //UNIX/Linux file service// is automatically assigned to each GWDG account. This storage can be accessed via //dialog// or //samba server// or using the //parallel computers//.

Almost the entire //UNIX/Linux hosts// within the GWDG use the global file systems  //StorNext//. The directories are in general, shared simultaneously on multiple systems accessible by users via the NFS protocol.

Individual user directories can be exported to a UNIX/Linux system within an institute using NFS if the performance requirements exceed the access using a the samba server. You can request the NFS export by sending an E-Mail to  [[mailto:support@gwdg.de|Support@GWDG.de]]

In a //UNIX/Linux dialog session// the file service is structured by the following three environment variables:

^ Variable Access^ Description^ Default Size ^
|''$HOME''|Home directory for constant data.|   25 GB|
|''$THOME''|Home directory for temporary data, \\ which is generally deleted by GWDG after a week.|   6 GB|
|''$AHOME''|Home directory on the archive server.|  unlimited|

After a successful login the user will be placed into his or her home directory ''$HOME''.
There UNIX commands can be invoked.
If the assigned storage (by default 25GB / 6GB) is not sufficient an informal request for expanding the quota can be sent to [[mailto:support@gwdg.de|Support@GWDG.de]].

''$THOME'' is to be used for saving files temporarily. Please note that in ''$THOME'' aged one week or more will be __erased__ automatically __without notification__. In order to use  ''$THOME'' via the samba server the following commands must be executed on a dialog server. (This has to be done only once.)
<code>
cd $HOME
ln -s $THOME ./thome
</code>
If files need to be archived in order to keep free space at your ''$HOME'' director they can easily be moved to ''$AHOME'' using //UNIX// commands.
You can find more Information in the article for
[[en:services:storage_services:data_archiving:start| Data Archiving]].