Getting Started

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Check your knowledge of the concepts from the Getting Started module

1) Practices and Policies

True or False: All files on Engaging are backed up

True

False

Jobs cannot be submitted to or run on Engaging during regularly scheduled maintenance. How often and when do the maintenance windows occur?

Weekly on Mondays

Monthly on the second Tuesday

Weekly on Thursday

Monthly on the third Tuesday

To get help with Engaging I can:

Search the documentation on the orcd-docs.mit.edu web page.

Send email directly to the last Engaging team member I talked to.

Send email to orcd-help@mit.edu or orcd-help-engaging@mit.edu.

Stop by the ORCD Office Hours.

True or False: I am mentoring a student on a project that uses Engaging. I can give them access to my account so they can do their work.

True

False

True or False: I suspect another user may be misusing the system. I should find out who they are and reach out to them to correct them.

True

False

True or False: Any and all data can be put on Engaging, as long as it is needed for my work.

True

False

2) Linux Command Line

Which of the following statements about Linux file and directory names is/are true? (Select all that apply.)

File and directory names are case sensitive

Linux uses forward slashes ( / ) in its pathnames

Blanks or spaces are ok to use in file or directory names

Alphanumeric characters ( a-zA-Z0-9 ), dot ( . ), hyphen ( - ), or underscore ( _ ) are ok to use in file or directory names, but characters like percent sign ( % ), dollar sign ( $ ), asterisk ( * ) are not ok

Type out the command to list the contents of a directory in long form in reverse time order (put all flags in a single -, for example -la instead of -l -a):

Type the command to display just the last 10 lines of a text file named filename.txt. Do not use any flags.

How would you delete a directory "mydir" and all of the files in it?

rm -d mydir

rmdir mydir

rm mydir

rm -r mydir

rm -f mydir

How would you add "localdirectory" in your home directory to your existing Linux command line search path?

export PATH=$HOME/localdirectory

echo $PATH

export PATH=$HOME/localdirectory:$PATH

addpath($HOME/localdirectory)

3) File System Use

Select the parts of the filesystem that are backed up

Home

Pool

Scratch

Say you have 100 GB of short news articles that you will be processing independently. Each article is at most a few KB. What would be the best way for fileystem performance to organize your data? Note that there may be more than one acceptable answer, but there is one best answer.

One file per article, all in the same directory

One file per article, keeping to 1000 files per directory

1,000 100 MB files all in the same directory

100,000 1MB files all the same directory

100,000 1MB files evenly split across 100 directories

You are training a neural network on a dataset containing millions of images. How should you store these images?

One image per file, all in a single directory.

One image per file, split up into no more than 1000 files per directory.

Several large (>100s of MB) HDF5, TFrecords, NetCDF, WebDataset, or multi-page TIFF files.

4) File Transfer

Enter one of the command line commands you can use to transfer files between your computer and Engaging:

Enter the file transfer command which will allow you to transfer only new or updated files of a given directory

5) Software and Package Management

Before installing software or a package, first (check all that may apply)

Check if there is a module with the "module avail" command.

Install all its dependencies with "sudo apt-get".

For packages, check if they are already installed through our Python, Julia, or R installations.

Look for instructions for a system-wide installation.

Look for instructions for a home directory installation.

Where can you install software and packages on Engaging?

In your home directory

In a root directory

You can always use the default install location

True or False: You can use sudo to install software or packages

True

False