Theresa Sheehan

March 10 2020:

I found this funny thing online: https://xkcd.com/1489/

March 2 2020 Meeting Notes:

Attempts to install from BIOS failed, the UEFI worked.

On newer machines, there are defiled OS disks, which are RAID. RAID discs preserve data in the case of a failure. The OS installation destination should be there.

Hadoop does not use RAIDed discs to preserve space.

We will follow along with what Rohan and Sahir are doing, for practice. Their logbooks will serve as guides.

I will have to check the configuration for the machine.

Feb 29 2020: Installing Centos7 on Virtual Box:

I will follow this guide: https://resources.infosecinstitute.com/installing-configuring-centos-7-virtualbox/

Creating the image on VirtualBox:

Please ignore the fact that it is Centos8, I eventually installed Centos7

Installing Centos7:

Using the virtual image:

Feb 24 2020, in the cluster:

Reading Centos7 Installation guides:

I read the following websites:

https://docs.centos.org/en-US/centos/install-guide/getting-started/

https://phoenixnap.com/kb/how-to-install-centos-7

https://linoxide.com/how-tos/centos-7-step-by-step-screenshots/

I also read the old logbooks of the students who did this last year to try to get some settings.

The beginning steps all include downloading an .iso, putting it on a bootable USB, and following the instructions of the gui that pops up.

To get the gui to pop up: You need to turn the computer off, then when the system is booting up, you hit a key so that you can install Centos. After selecting some options, the gui will load.

Once the gui loads, some important settings include language, installation destination, security policy, software selection, network and hostname, partitioning scheme, swap space, mand date and time. After installing with those settings, we will have to create a root password and a user. Then, the installation is complete.

Installation Settings:

Language: English
Network and Hostname: Address: 10.1.0.101 Netmask: 255.255.0.0 Gateway: 1.0.1.0.1
Software Selection: (probably) Compute Node
Installation Destination: Under Local Standard Disc
Security Policy: On
Partition scheme: Default setting, will change later
Swap space: Automatically created and not changed.
Date and time: US East Coast

Root password and user information will be given.

Task: Get a Centos7 image and install it on our VM as a test run. It is okay to install will full desktop, even though that setting will not be applied to the real computers.

Feb 17 2020: Second Meeting

Notes on software:

CRAB is used for submitting jobs to non UMDT3 clusters, but Condor is used for jobs to be run using the UMDT3 cluster. When you have to use the grid, you must use CRAB.

Puppet is used for user management.

A shell is a command interpreter.

Showing hidden files:

Show the directories and their storage:

Next Task:

Install CENTOS7 on two machines: r720 and r510

Read software update guide

*Get permission to acce

HONR269L:

Feb 12 2020: First Connections

Setting up PuTTy:

Logging in:

Trying to enable the web directory:

Trying to get Kerberos tickets:

Trying to run CMSSW:

ept 10, 2019:

Practicing Linux Commands

echo $0, echo $SHELL, pwd, ls:

ls -l:

ls --help:

mkdir new_directory, pwd, ls, ls .., cd .., rmdir new_directory:

ls -CFX /usr/bin:

ls -l /bin:

find /usr -name "*g++" -print:

which g++:

whoami, echo ~, ls ~, cd ~, pwd:

File Operations:

Emacs:

what happens when you do emacs -nw test.txt:

Sept 19: Batch Commands:

testscript.tcsh:

Trying to fun the .tcsh:

Making testscript.tcsh executable:

Oct 3: intro to c++

main.cpp:

Finding out the version of c++ on the vm:

Finding header files:

Adding in argument to g++:

Variables:

Operations:

The out of ++n and n++ are the same.

Other Variables:

While Loop:

for loop:

Debugging:

October 10th:

Conditions:

I think there was an error in the code given, so I decided to change to make more sense

Pointers:

The difference between Program 1 and program 2 is that in program 1, the value of i is stored in j, while the variables and i and j maintain separate addresses. In program two, because p is defined as the memory address of i, changing i will affect the value at p, and changing the value at p changes the value of i.

Oct 20 2019: Arrays, files, and rng