Server hostname: hosea.enc.edu
Remote Terminal Access
Use ssh ("secure shell")
to establish a remote terminal session, giving
you access to the command-line. Any good
ssh client will work (see links to right;
note that cygwin bundles with it a very good
command-line ssh client).
Telnet is not supported.
X-Windows
Access
Coming shortly.....
File Access
Use WinSCP (see link to right).
At present the SCP protocol must be used.
SFTP will be supported later.
Editors
The following text editors are
available:
vi
ee emacs xemacs
Perl
Start off all scripts as shown
below. With the "strict" and "warnings"
pragma the perl interpreter does its very best
to help you write clean, solid code.
#!/usr/bin/perl
use warnings;
use strict;
Web / CGI Notes
hosea.enc.edu is running the
HTTP daemon Apache. Docs
are available both locally and
on the Apache site.
key web directories on
hosea
- /usr/local/www/data - "Document
Root".. the root of the hosea.enc.edu web
file namespace
- /usr/local/www/cgi-bin - root
of directory tree enabled to run CGI scripts.
This directory is grafted virtually onto the
root of the web namespace (ie. at "/cgi-bin")
log files
Examining log files
is often a key part to debugging your CGI scripts.
There are two:
- /var/log/httpd-access.log
- /var/log/httpd-error.log
Use the 'tail' command to see
the most recently logged events. The error
log is of primary interest. Once great
technique is to leave this command running in
an xterm so you can see events as they happen:
tail
-f /var/log/httpd-error.log
PUBLISHING
Both the "data" and
"cgi" directories have a subdirectory "intarch".
In each of these is a personal directory for
each member of the class. To make access
simpler each of you has a directory $HOME/web
which contains symbolic links to your two personal
web directories.
data
File access
User 'schmoej' puts data
(HTML, etc.) in directory /usr/local/www/data/user/schmoej,
which may also be accessed via ~/web/data.
HTTP access
URL: http://hosea.enc.edu/user/schmoej
cgi
File access
User 'schmoej' puts cgi scripts
in directory /usr/local/www/cgi-bin/user/schmoej,
which may also be accessed via ~/web/cgi.
HTTP access
URL: http://hosea.enc.edu/cgi-bin/user/schmoej/<scriptname>
Code Securely!
- All code should carry the
'-T' flag at the end of the bang-path to enable
taint checking. See 'perldoc perlsec'
for a discussion of this feature. Dealing
with this properly is key to keeping your
scripts secure. Insecure scripts will
be deactivated or deleted when discovered.
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