Statistics 250 Lecture Note 02
Contents
1. Statistics 250 Lecture Note 02 10 02 2013 Taken by Shan Yu Liu 1 Warmup Exercise 3 Write a program that prints the numbers from 1 to 100 But for multiples of three print Fizz instead of the number and for the multiples of five print Buzz For numbers which are multiples of both three and five print FizzBuzz source http www codinghorror com blog 2007 02 why cant programmers program html SSH secure shell To ssh into a remote machine you can use the following command For example if you want to access Gauss ssh username gauss ucdavis edu For Windows users you can use GUI graphical user interface tools like WinSCP ssh secure shell client or PuTTY ssh tells shell to access the server chmod gives permission to run the script cd change directory scp allow you to copy files to from local machine to a server rsync uses remote update protocol which allows us to transfer just the differences between two sets of files man shows user manual that is built in Linux Gauss See http wiki cse ucdavis edu support general security ssh for how to set up a Gauss account Create a script use nano vi or emacs to log into Gauss faster For example create a file called gauss_log and use the following command bin bash It tells the shell what program to interpret the script with when executed ssh vX username gauss cse ucdavis edu It will connect to Gauss A 5 chm2. od u x gauss_log It gives permission to execute the script otherwise you would get permission denied when you run the script gauss_ssh It will run the script use tar cvzf and tar xvzf to compress and uncompress your file use nano and vi m to create open a file See lecture 02 slides page 15 18 for more detail GitHub git clone git github com username Stuff git It sync file from GitHub to Gauss git add Add file contents to the index git commit a Record changes to the repository and a tell the command to automatically stage all files that have been modified and deleted git push Upload files to GitHub git pull Download files from GitHub git status Show the working tree status git diff Show changes between commits commit and working tree etc git merge Join two or more development histories together git mv Move or rename a file a directory or a symlink git rm Delete files from the working tree and from the index gitignore Git will use its rules when looking at files to commit Therefore it can tell git what files to ignore Gauss Batch file The head node Gauss is not designed to do major calculation Therefore we need to use computer nodes for calculation sh Tell Gauss how to run R code py Tell Gauss how to run Python code SBATCH job name Give a name for this particular job srun Run parallel jobs For example use srun R script o out filename squeue show the s
3. tatus of running jobs scancel Cancel a job err error file out output file 6 Python and R e Python For Windows you can use Spyder PyCharm For Mac already installed use python version to check version eR RStudio is recommended
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