Convert jupyter notebook to shell script. Add README

Unix/README.md

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+The bulk of this tutorial is written in [Unix (1).ipynb](Unix (1).ipynb) and [Unix (2).ipynb](Unix (2).ipynb). We found that it was better to do a live demonstration in a linux shell rather than installing the bash kernel for Jupyter, so [Unix (1).ipynb](Unix (1).ipynb) was repurposed into [Unix (1).sh](Unix (1).sh).
+
+Files necessary for the tutorial are stored in files_for_practice.tar.gz
+
+More detailed information on `ssh` and GNU `screen` are in their respective markdown files.
+

Unix/Unix (1).sh

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+# Intro to Unix
+# File system
+ls /
+ls -la /
+pwd
+cd
+cd specific dir
+cd ..
+cd -
+cd ~
+
+ls ~
+mkdir newdir
+cd newdir
+
+wget https://raw.githubusercontent.com/KIPAC/BootCamp/master/Unix/files_for_practice.tar.gz
+tar -xzf files_for_practice.tar.gz
+
+cd files_for_practice/random_files
+mkdir mp3
+mv *.mp3 mp3
+mkdir est
+cp est.* est
+mv architecto.mp3 consequuntur.html
+rm -i molestias.css
+
+# Read text files
+tail -n 2 users.txt
+head -n 3 clients.txt
+
+# Where are these programs?
+which tar
+which wget
+which which
+
+# The PATH environment variable stores the directories the shell searches when it is told a command
+echo $PATH
+
+# File permissions
+cd ../executables
+./wget
+./tar
+
+chmod u+x tar
+./tar
+
+chmod u-r alphabet.txt
+cat alphabet.txt
+chmod u+r alphabet.txt
+cat alphabet.txt
+
+# I/O redirection
+command < input_file
+command > output_file
+command < input_file > output_file
+
+# append
+command >> output_file
+
+# use stdout from command1 as stdin of command2
+command1 | command2
+
+# for example if we want to pass in alphabet.txt to reverse we use
+chmod u+x reverse
+./reverse < alphabet.txt
+
+# how many files are in a directory?
+# use one program to list the files
+# use another program to count
+cd ../random_files
+ls -l | wc -l
+ls -l *.png | wc -l
+
+cd
+# grep
+grep ^d users.txt
+grep ^d *.txt
+ls -l | grep -E i.\.mp3
+
+# search grepdata.txt for all lines that do not begin with a capital letter
+grep '^[^A-Z]' grepdata.txt
+
+# sed
+# sed 's/phrase/replacement/' filename
+sed 's/\./SPAM/' users.txt
+sed -i.bak 's/\./SPAM/' users.txt
+
+# awk
+ls -l | awk '{print $1}'
+
+# ps and kill
+ps
+kill
+
+# Editing your .bashrc
+alias ll="ls -larth"
+alias farmshare="ssh rice.stanford.edu"
+cdls() { cd "$@" && ls; }
+
+# Screen and Notebook
+# Useful for daily workflow like keeping a kernel running, but not intended to run long jobs.
+screen -S jupyter
+jupyter notebook --port=1738 --no-browser
+ssh -t -L 1738:localhost:1738 rice.stanford.edu
+screen -X -S myscreen quit
+