6. Frequently-asked questions
Is this Unix?
- Informally, yes. Legally, no. This service is running Debian GNU/Linux, an
open-source and free alternative to Unix. In practice, all the standard Unix commands
and facilities behave identically under Linux.
Is there some temporary space for big files?
- Yes, you can create files in
$TMPDIR, but they are not
guarenteed to still exist after you log out. This facility is for files you need
during your current session, not for temporary storage over several days. Files will
also be deleted when they get to be a week old, so their life time is per-session or 7
days, whichever is shortest. In summary, if you logout and login again, you cannot
rely on the contents of the temporary directory still being there. Note also that the
temporary directory depends on which node you log into; if you log in twice, you may
not be on the same machine for both sessions.
What shells are available?
- The default login shell is
bash, the Bourne Again Shell. If you
prefer to use C Shell,
tcsh is available. To invoke this for a
single session, type
exec tcsh To set this as your default shell for
future logins, use the web-based account management interface.
FTP doesn't seem to work - what can I do ?
- FTP has two modes - active and passive. Due to the firewall in front of the linux
server, active FTP doesn't work. Thus to use FTP you have to use passive mode, to do
ftp -p or
Can I print to a remote printer?
- You can send print jobs to a remote lpd server (line printer daemon) using the
rlpr command. See the
rlpr manual page for
full details and examples. Please contact your local IT support staff for information
about printers and print servers in your college or department.
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