Final Quiz

What identifies hidden files, and how would you show them with ls?

They start with ’ ~ ’ and you’d use ls -h

They start with ’ . ’ and you’d use ls -h

They start with ’ . ’ and you’d use ls -a

The following is output from `ls -lh`. How big is the file b.txt?
~~rw-rw-r~~- 1 username username 2.0K Oct 13 11:57 a.txt
~~rw-rw-r~~- 1 username username 4.0K Oct 13 11:57 b.txt
~~rw-rw-r~~- 1 username username 512 Oct 13 11:57 c.txt

1 Kilobyte

4 Kilobytes

4 bytes

512 bytes

I ran the command `rm tmp.txt`. How do I recover the file tmp.txt?

You can’t

Using recovery tools that examine a disk in detail

From a backup

Look in the Trash or Wastebin

I have the following files in my current working directory:
tmp0.txt tmp1.txt tmp10.txt
tmpa.txt temp.txt
Which of the following would be output by `ls tmp[0-9].txt` ?

tmp0.txt tmp1.txt tmp10.txt tmpa.txt

tmp0.txt tmp1.txt tmp10.txt

tmp0.txt tmp1.txt

tmp0.txt tmp10.txt

The following shows several types of jobs and SCRTP facilities. Place them according to where they ought best be done.

Godzilla and Login nodes

Submit to queue on Orac or the COW

Apply for time on a dedicated facility

To sort

Compressing files (zip, tar)
Small compute jobs (< 64 processors)
Data analysis and visualisation
File copies (e.g. scp)
Compiling code
Plotting data (small tasks)
Very large compute jobs (> about 512 processors)
Creating and editing scripts and code
Large compute jobs (64 – about 512 processors)

I create an environment variable using `export MYVAR=value`. Match the following commands with their output.

echo $MYVAR
echo ’$MYVAR’
echo MYVAR

MYVAR
$MYVAR
value

How would one load Python 3 from the module system, in this case Python 3.5.4? (Note that on machines like Orac you may need to have loaded some other modules first).

module load Python/3.5.4

module install Python3

module spider Python/3.5.4

import Python3

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Scientific Computing RTP

SCRTP Desktop Quiz

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