PROGRAMMING PROJECT POLICIES AND UNIX INTRO Sal LaMarca CSCI 1302, Fall 2009

Programming Project Policies  All programs must compile and run on Odin using Java (Sun’s JDK)  Odin is a Linux server that can be accessed via an SSH connection to odin.cs.uga.edu  You may develop your code in an IDE on other operating systems, but it is your job to transfer all files to Odin and to compile, run, and test on Odin using Java  Start projects early and ask for questions as early as possible.

Programming projects requirements 1. All Java source code for the project 2. A Makefile to compile all of your source code 3. A plain text file named readMe.txt that contains detailed instructions on how to compile your source code and how to run your program. The readMe file should also contain a brief description of the files included in the project 4. All Java source code must be commented thoroughly. Each class, function, and significant blocks of code must be well commented.

Getting your Odin account  Present your student id to the student workers in Boyd 307, and ask them for your Unix accounts  They should give you slips of paper containing login information for your Odin and Atlas accounts  I highly recommend changing both your Odin and Atlas passwords to the same password  If the student workers in 307 do not have an Odin account for you, please

Boyd 307 open lab  The lab includes several Linux machines and Windows machines  To login to the Windows machines, use the user id given to you for your Unix accounts, and the password is your 9-digit 810 number  To login to the Linux machines, use the user id and password that you use to login to your Odin/Atlas account

Connecting to Odin via SSH  Mac, Unix, and Linux users can open up a command prompt and issue the command  ssh odin.cs.uga.edu  Windows users must download and run an SSH client like putty to connect to Odin  ~sgtatham/putty/download.html

File transfer to/from Odin  Must use an SFTP (secure file transfer protocol) client to transfer files to and from Odin  Filezilla is a free SFTP client that has an easy to use GUI 

Unix commands (case matters)  passwd  Changes your password  pwd  Shows the current working directory  man command  Get help using the manual page  man pwd  ls  List the contents of a directory  ls -la  ls -all  cd  Change directory  echo  Echo’s a string to standard output

Unix keyboard shortcuts  CNTL+Z  Stops/suspends the current command  fg Restore the last suspended command  CNTL+C  Kills some commands or processes  Tab  Autocompletes commands and file names  Up and down arrows  Scrolls through command history

Unix special command symbols  ~  Home directory  cd ~ Change to home directory .  Currently directory ..  Parent directory  cd.. Change to parent directory  >  Redirect output of a command to a file  ls -all > directoryContents.txt  |  Pipes the output of the command to the left to the input of the command to the right  ls -all | less

File commands  mkdir  Create a directory  mkdir project1  touch  Create a file  touch file.txt  cp  Copies a file  cp file1.txt file2.txt  rmdir  Remove a directory  rmdir project1  rm  Remove/delete a file  rm file.txt  mv  Moves or renames a file  mv file1.txt /usr/file2.txt  mv file1.txt file2.txt

Chmod command  Changes the permission of a file or directory  chmod u+rwx file.txt Permit the file’s owner to read, write, and execute file.txt  chmod g-rwx file.txt Remove read, write, and execute permissions from the file’s group  chmod o-w file.txt Remove write permissions for other users who are not owners of file.txt  chmod a+rw file.txt Permit all users to read and write file.txt

Misc commands  cat  Lists a file’s contents  cat file.txt  which  Lists the complete path of a command  less  Scroll through a file  quota -v  Check how much space you have in your account  exit  Logs you off  ps  Shows the current processes you are running  kill Kills a process First lookup a process’s id with ps, then issue a kill command like kill kill  You must issue kill commands to stop processes that are taking up a lot of resources (like an infinite loop)  Failure to stop an out of control processes may result in having your account frozen or suspended by system administrators