Setup Git

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# install git
sudo apt-get install git

# set user, name, email
git config --global user "ivanlevsky"
git config --global user.name "ivanlevsky"
git config --global user.email "ivanlevsky@gmail.com"

# use this to fix git push ssl error 10054
git config --global http.sslVerify "false"

Use Git

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clone repo

git clone https://github.com/ivanlevsky/ivanlevsky.github.io.git

set ssh key in new computer

# generate ssh key
ssh-keygen -t rsa -b 4096 -C "ivanlevsky@gmail.com"

# copy public key in id_rsa.pub to github, add SSH keys in github setting page
cat ~/.ssh/id_rsa.pub

# test ssh key
ssh -T git@github.com

check git commit history

cd ../git project dir/
git log

delete commit log

cd ../git project dir/
git reset --hard commit id