Good IMAP clients include: thunderbird, balsa, pine*, evolution.
*) pine is replaced by alpine on some new machines.
How to access our system from remote computers
The preferred method of accessing our system from outside is
ssh and scp (read respective man pages,
RTFM shortly). Never use telnet or ftp. You
have to add -X flag to run window applications remotely
(check the ssh man page for details), alternatively add ForwardX11
yes to your ~/.ssh/config file as described on the
ssh_config man page. Remember about the security implications!
- Use scp or sftp for file transfer.
How to access PDC system convinently?
In the same way as the lenngren system.
How to download whole directory tree?
Use a GNOME program gftp. Just type gftp& at
the command prompt or find it in the right button mouse menu. It is a
very convenient program -- particularly for GUI-oriented users.
Another option is to use wget (it is installed only on beta
due to my laziness and the rare need for such a tool). Example (check
wget --help for more help):
wget -r ftp://pawsa:password@hostname//full/path/to/the/directory
Data safety (backup)
Due to lack of man power only
/home directory is backed up to the tape. The incoming mail
folder is NOT backed up - move important e-mails to folders in your
Full backup (0 level backup) of the /home directory
is done once every 6 weeks
on a 12/24GB magnetic tape streamer. Every week (weekend) we intend to
do incremental backup on the 2GB tapes. In this incremental backup
of certain level only new files or those that changed from the last backup of the
same or lower level are copied to tape. Currently the scheme for
backup levels is 0 - 5 - 4 - 7 - 6 - 9 - 8 - 0.
Backup can be done only by root on elf. Read the file
the root directory there for more details. See also manual pages for
dump and mt.
How to restore files that were accidentally deleted?
We intend to do regular incremental backup of /home directory every week
(see Data safety (backup)). Thus all the files older
than week, or the files created before last backup (usually on weekends)
should in principle be possible to restore. It is however necessary to find
the right tape on which the file should be copied (look on the backup level
scheme, and also to the file backup.history). Restoring files is
done by command restore - again it has to be done by root on elf. See
file README.backup and man restore for more details.
Ask Viktor or Pawel if you need to restore your files.
Currently we are not doing a backup of mail folder. Please move
important mails to the folders in your home directory.
Magnetic tape is a slow medium. Restoring of the files take
therefore relatively long time (more than half hour).
What directory can I use for a computation's
Use /scratch (if it exists) or /tmp directory.
On computers where /scratch exists it is optimized for high
performance IO and much faster than /tmp.
If performance is a factor never use the shared directory
(/home and subdirectories). This disk is 20-80 times slower than
local /tmp space - it is actually the network which is the
bottleneck. If you run out of space, consider rather direct
Observe that files in /tmp not touched for one month
are automatically removed by the system.
Documentation for different LaTeX packages
- /usr/doc directory
home page at IFM, Linköping.
What has happened to xmgr? How can I create plots?
xmgr was not developed or supported for many years. It has been
replaced by xmGrace which
comes with an excellent online help (look in the menu).
Send your questions to
(or just walk to the right room, that's much simpler, isn't it?)
Your feedback is most welcome!
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