jrotter2/summer2022-pythontutorial

Simple Python/ROOT Tutorial for CMS@Rice Summer 2022

Summer 2022 - Python Tutorial

Simple Python/ROOT Tutorial for CMS@Rice Summer 2022

Logging into a Cluster

Lxplus

Lxplus is the CERN computing cluster based in Geneva. Using your cern credentials to login,

ssh <username>@lxplus.cern.ch>
(Prompted to put password)

cmslpc

cmslpc is the FNAL computing cluster based in Chicago. Login requires downloading a Kerberos configuration file and modifying your .ssh. Directions can be found here Using your FNAL credentials you then do,

kinit <username>@FNAL.gov
(Prompted to put password)

ssh -Y <username>@cmslpc-sl7.fnal.gov

Setting Up CMSSW

CMSSW is CMS SoftWare that will create an evironment for development and running code. Use scram list -a to list all releases of CMSSW. On cmslpc you first need to do source /cvmfs/cms.cern.ch/cmsset_default.sh.

cd <working_dir>
cmsrel CMSSW_12_0_1
cd CMSSW_12_0_1/src/

cmsenv

Setting Up GitHub

First thing is to generate a key pair using the command using your GitHub email

ssh-keygen -t rsa -b 4096 -C "[email protected]"

Press return and set passphrase. Copy the contents of ~/.ssh/<file_name>.pub. Open GitHub>Settings>SSH keys then click Add SSH Key and paste the contents.

Pulling from GitHub

Fork this repository using the button in the top right. This will create your own version of the repository for you to edit.

Now you can clone the repository to the cluster using,

git clone [email protected]:<github_username>/Summer2022-PythonTutorial.git
cd Summer2022-PythonTutorial

Now you can create your own branch for development using,

git checkout -b <your_new_branch_name>
git push origin <your_new_branch_name>

Pushing to GitHub After Changes

After making changes to the code you can add, commit, then push your changes to your new branch on your fork.

git add .
git commit -m "Write Some Message"
git push