Transcript NJIT_UCS_Programming..

Managing your Web site and
Programming on NJIT
University Computing Systems
George Blank
University Lecturer
Getting Started on UCS
• This presentation will aid you when using the
university computing systems at NJIT.
• You can log on to these systems with your NJIT
UCID and Password.
• If you are accessing NJIT from off campus, you
will need to use VPN (Virtual Private Network).
• You can store and run your programs from the
same location you would use to create a home
page. (I suggest that you use sub-directories)
Virtual Private Network
• See instructions at http://ist.njit.edu/vpn/
• You need to install VPN and establish a VPN
connection before you can download
software from NJIT or log on to University
Computer Systems from off-campus.
Downloading Software from NJIT
• NJIT provides software for download by
students at http://ist.njit.edu/software/
• You need to establish a VPN connection if
you are off-campus.
Managing your files from a Mac
• Mac OS X's built-in command-line SSH and
sFTP work just fine with NJIT’s UCS servers.
• To use SSH, see
http://ist.njit.edu/support/ssh/sshmac.php
Connecting to UCS with SSH
• One way to manage files on UCS from Microsoft
Windows is to use SSH Secure Shell, both in
terminal mode to run commands and in file transfer
mode to upload and download files.
• Find the appropriate version on the Software
Download page at http://ist.njit.edu/software/ and
follow the instructions.
• Once you install the software, run it, then click on
Profiles to add a profile with the name of the
system you want to access. Then edit it as shown
on the following slides.
Connection Establishment
Walkthrough with Windows and SSH
• Connect to NJIT through VPN first
Create an SSH connection profile
The screen shown is the
edit page after you have
added a connection
profile called OSL20.
All you have to add is
the full address,
osl20.njit.edu and your
UCID. Accept the
defaults for the other
entries.
Connect with SSH Secure File Transfer
Connected in Terminal Mode
• You can use
Unix
commands
from the shell
or open a file
transfer
window (see
arrow).
Connected in File Transfer mode
You can drag files
between windows
to upload and
download them.
You can also
change directories
and delete files.
Things to do in SSH Terminal Mode
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http://ist.njit.edu/software/userguides.php
You can use basic Unix commands
You can edit with Unix editors.
You can run Python interactively by typing python
You can run a Python program by typing
python yourFilename.py
• You can compile a C++ program with cpp (You will
need to research cpp to use it effectively)
• You can use many other languages including Ruby,
C and Java.
Using Java in Terminal Mode
• You may need to set the correct version of
Java. The current default is 1.6 because that is
needed by the version of Tomcat in use. You
may also need to add Java to your path. See
next slide for instructions.
• You can compile a Java program with
javac yourFilename.java
• or run it with
java yourFilename.class
Changing Java Version (tcsh)
• You can change the JAVA_HOME setting with:
setenv JAVA_HOME /afs/cad/linux/java_1.7.0_25_x64
set path=($JAVA_HOME/bin $path)
• You can make the change permanent by
appending those lines to your profile at:
$HOME/.login
Do not do this unless you need to get Java 7
working. Otherwise, use the default settings.
Changing Java Version (bash)
• You can change the JAVA_HOME setting with:
export JAVA_HOME=/afs/cad/linux/java_1.7.0_25_x64
export PATH="$JAVA_HOME:$PATH”
• You can make the change permanent by
appending those lines to your profile at:
$HOME/.profile
Do not do this unless you need to get Java 7 working.
Otherwise, use the default settings.
OpenAFS
• You may wish to install OpenAFS on Mac or
Windows. This will allow open and save files, and
run programs directly from your system.
• Find the appropriate version on the Software
Download page at http://ist.njit.edu/software/ and
follow the instructions.
• If you use OpenAFS with an editor or IDE, you
may have to set your software to end each line
appropriately with LF (Unix) CR (Mac) or CR/LF
(Windows). SSH and some editors and IDEs do
this automatically.
Web servers
• If you want other persons to access your HTML
files, load them to your public_html folder or a
subdirectory and access them from web.njit.edu.
• If you want to access sound or video, you have to
use the Web server at harp.njit.edu. Both web and
harp use the Apache Web server, but web has
audio and video disabled to speed up access.
• If you want to run JSP or servlets from the Tomcat
Web server, ask How do I install Tomcat on AFS?
at http://njit.intelliresponse.com/it/
Updating Your Home Page
• See http://ist.njit.edu/webhosting/
• While you run your home page from Web or Harp,
you should update your files on another system.
• Let us assume that your UCID is xyz123
• If you are accessing a file named menu.html from
Harp, the URL would be
http://harp.njit.edu/~xyz123/menu.html
• If you are editing the same file on a UCS host, the
path is ( /u/x/y/ are higher level directories to partition user directories)
/afs/cad/u/x/y/xyz123/public_html/menu.html
Web pages without file names
• NJIT Web servers look (in order) for files named
index.htm, index.php, index.html, and
index.shtml. If one of these files is in the current
directory, it will be loaded without specifying the
file name.
• Example: user xyz123 has a file called
index.htm in directory public_html. That file will
load with http://harp.njit.edu/~xyz123/
• The home.page.setup tool described at
http://ist.njit.edu/webhosting/ will create an
index.html and set proper file permissions.
NJIT UCS Systems you can access
• See http://ist.njit.edu/accounts/accessafs.php
• This changes frequently, and may be out of date.
Add “.njit.edu” to all system names given.
• For Web servers only: web and harp
• Linux Labs on GITC second floor: osl1 through
osl80 These systems may soon be blocked from
remote access outside of rooms 2315C and 2400.
• Preferred Systems: afsaccess1, afsaccess2,
afsaccess3 and afsaccess4
• Alternates: afsconnect1 and afsconnect2 These
systems are heavily loaded and busy.
Notes on Access to UCS
• Some pages at http://ist.njit.edu/ suggest that you use afs1
thru afs33. All the odd numbers are now redirected to
afsconnect1 and all the even numbers to afsconnect2.
• The Sun Sparc workstations that were the afs machines
were first renamed sunlab1 thru sunlab33, then later
disconnected. Those names can not now be used.
• NJIT has referred to their Unix-like systems as both AFS
(for the Andrew File System) and UCS (for University
Computing Systems). UCS is more accurate.
• In some cases, the best available information for some
Unix applications may be at web.njit.edu, but that site is
obsolete, no longer updated, and subject to “Bit Rot.” Use
http://ist.njit.edu/ by preference.
Applet Security Problems
• Java applet security is becoming more
restrictive over time due to a large number of
Web attacks using Java.
• Jar files are required and JNLP is
recommended for applets. Jar files should
have a manifest file that includes permissions.
• Since instructions change over time, search
“Deploy Applet” on the Oracle Java Web site
for current instructions.
• The next few slides show typical problems.
Unsigned Applet
If Java permissions are restricted, this window
may not be shown and applet will be invisible.
No Permissions in Manifest File