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student:stu:basics [2019/02/15 17:19] – bernstdhstudent:stu:basics [2023/02/19 12:08] (current) – [Accessing Lab Computers] morrispj
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 +===== Help with stu.cs.jmu.edu =====
 +"stu" is a server running Linux that is available to all students in the JMU
 +Computer Science Department.
  
 +==== Logging in to stu ====
 +You can login to "stu" using an SSH client (and the host name   ''%%stu.cs.jmu.edu%%''). All modern operating systems should come with command-line SSH client (usually named ''%%ssh%%''). Windows 10 users may need to install the client [[https://www.howtogeek.com/336775/how-to-enable-and-use-windows-10s-built-in-ssh-commands/|manually]], depending on version and edition. GUI SSH clients are also available, but add little.
  
-===== Help with stu.cs.jmu.edu =====+To log in, type the following in a terminal/cmd window, replacing <eid> with your JMU username.
  
 +    ssh <eid>@stu.cs.jmu.edu
  
-"stu" is a server running Linux that is available to all students in the JMU +Enter your password when prompted. Nothing will appear on the screen so type carefully!
-Computer Science Department.+
  
 +=== Keypairs ===
 +You can avoid the need to authenticate yourself (with your eID and password) each time you login [[ student:utilities:start:keypairs | using a public/private key pair]]. This is particularly useful when using another protocol (e.g., Subversion or Git) on top of SSH.
  
 +==== Accessing Lab Computers====
 +To log into a specific lab computer you first login to stu as normal and then ssh to a lab machine by hostname. The hostnames are based on the room and computer number and take the form "L[room_number][computer_number].cs.jmu.edu".
  
-==== Logging in to stu ====+^ Room         ^ Hostname Range          ^ 
 +| ISAT/CS 248 | L248{01..32}.cs.jmu.edu | 
 +| ISAT/CS 250 | L250{01..31}.cs.jmu.edu | 
 +| ENGEO 2204 | L2204{01..32}.cs.jmu.edu  | 
 + 
 +This can be simplified by using the ''-J'' option to ssh. For example, the following command would jump through stu to reach a lab computer in ISAT/CS 250. 
 + 
 +    ssh -J <eid>@stu.cs.jmu.edu <eid>@l25005.cs.jmu.edu 
 + 
 +You can do this transparently by adding the following to your ~/.ssh/config:
  
-You can login to "stu" using an SSH client (and the host name   ''%%stu.cs.jmu.edu%%''). All modern operating systems should come   with command-line SSH client (usually named ''%%ssh%%''). GUI SSH   clients are also available, but add little.+    Match !host stu.cs.jmu.edu host *.cs.jmu.edu !exec "nc -z -w 1 %h %p" 
 +        ProxyJump stu.cs.jmu.edu
  
-You can avoid the need to authenticate yourself (with your eID and password) each time you login [[ using a public/private key pair | student:utilities:start:keypairs]]. This is particularly useful when using another protocol (e.g., Subversion or Git) on top of SSH.+This uses netcat to determine if you can connect directly to the host and if not, for all .cs.jmu.edu hosts other than stu, jump through stu. Connecting to a lab machine with this configuration is the same from on or off campus: ''ssh l25005.cs.jmu.edu''.
  
 +Setting up keypairs is highly recommended if you're doing this regularly to avoid multiple password prompts.
  
-==== Transferring Files to stu ====+==== Transferring Files to and From stu ==== 
 +You can transfer files to "stu" using an SCP client (and the host name  ''%%stu.cs.jmu.edu%%''). Modern operating systems include a command-line scp client named ''scp''. See [[http://www.hypexr.org/linux_scp_help.php|this article]] for some usage examples. There are also GUI clients available that work like a file explorer. Options include [[ https://filezilla-project.org/| FileZilla]], [[https://winscp.net/eng/index.php|WinSCP]] and [[https://cyberduck.io/|Cyberduck]]. Both SCP and SFTP use port 22 (see more detailed instructions on [[student:stu:filezilla|Transferring Files from Your JMU CS Account with FileZilla]].
  
  
-You can transfer files to "stu" using an SCP client (and the host name   ''%%stu.cs.jmu.edu%%''). +If you want a more seamless experience or the ability to edit files on "stu" using a local editor like Eclipse or VS Code, you can [[student:utilities:sshfs|mount your home folder locally]]. 
  
 ==== Using stu as an HTTP Server ==== ==== Using stu as an HTTP Server ====