Setting up github on Ubuntu

github-ubuntu.sh

#!/bin/bash
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# To use: 
# wget https://raw.github.com/gist/4411254
# chmod 777 github-ubuntu.sh
# ./github-ubuntu.sh
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echo "*****************************************"
echo " Step 1: Check your keys"
echo "*****************************************"
cd ~/.ssh
echo "if it says 'bash: cd: ./.ssh:No such file or directory', it "
echo "means its not generated and you should skip step 2."
echo "*****************************************"
echo " Step 2: Backup and remove existing SSH keys "
echo "*****************************************"
mkdir key_backup
cp id_rsa* key_backup
rm id_rsa*
echo "*****************************************"
echo " Step 3: Generate your credentials"
echo "*****************************************"
ssh-keygen -t rsa -C "dan@youremail.com"
echo " Now hit enter three times - acccept defaults"
echo "*****************************************"
echo "You will get following lines:"
echo "Generating public/private rsa ket pair. "
echo "Enter file in which to save the key(/Home/ubuntu/.ssh/id_rsa):"
echo "just press enter and now it will ask you to enter passphrase."
echo "note that passphrase you enter must be >4, otherwise you will "
echo "have to repeat whole process again."
echo "*****************************************"
echo " You should see:"
echo ""
echo "Your identification has been saved in /home/dan/.ssh/id_rsa."
echo "Your public key has been saved in /home/dan/.ssh/id_rsa.pub."
echo "The key fingerprint is:..."
echo "================================="
echo " Step 4: Save your new key"
echo "================================="
ssh-add ~/.ssh/id_rsa
echo "*****************************************"
echo " Step 5: Add your key to github"
echo "*****************************************"
echo "This command copies it so you can paste it"
echo "*****************************************"
gedit id_rsa.pub
echo "*****************************************"
echo " Copy its entire content. Then open the github "
echo " web site and login. go to 'Account Settings' >"
echo " Click 'SSH Public Keys' > Click "
echo " 'Add another public key' an paste it into "
echo " 'key field' then press Add key."
echo "*****************************************"
echo "*****************************************"
echo " Step 6: Check your keys"
echo "*****************************************"
echo " You should see this:"
echo " Hi dstroot! You've successfully authenticated, but GitHub does not provide shell access."
echo " Connection to github.com closed."
echo "*****************************************"
ssh git@github.com
echo "*****************************************"
echo " Step 7: Install the git tools"
echo "*****************************************"
sudo apt-get install git-core git-gui git-doc
echo "*****************************************"
echo " Step 8: Now configure git"
echo "*****************************************"
git config --global user.name "first last"
git config --global user.email "dan@.com"
git config --global github.user username
echo "================================="
echo " Good to go! "
echo "================================="

What is supposed to be "username" at line 72?