ChamplainTechJournals/sysadmin-ii-sys265/labs/lab04-git-and-linux-ssh.md

Git and Linux SSH

Note

This entry is pretty empty because I've already written this journal Entry for using git/github

Automating ssh authentication

• generate SSH key pair on your management node (in this case, web-01)
• push pubkey to github repo
• run the secure-ssh.sh script on remote host to create a new user that has the pubkey in .../.ssh/authorized_keys
• you can now ssh from web-01 to remote hosts without password!

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creating/adding ssh key

ssh-keygen -t rsa -b 4096 -C "sys265"
cat ~/.ssh/id_rsa

copy this to github SSH & GPG section

• to test: ssh -T git@github.com
• git remote -v
  • if git is using https. you will have to change it to use ssh
  • git remote set-url origin git@github.com:charlottecroce/champlaintechjournals

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before being able to commit, you will have to add the following authentication:

• git config user.email charlotte.croce@mymail.champlain.edu
• git config user.name charlottecroce

docker-01

copying config files to git repo

sudo apt install git
git clone https://git.charlotte.sh/lotte/ChamplainTechJournals
cd ~/champlaintechjournals/sysadmin-ii-sys265/configs/docker-01
sudo cp /etc/hosts .
sudo cp /etc/netplan/* .
sudo cp /etc/cloud/cloud.cfg .

mgmt-01

• install git from web

git clone https://git.charlotte.sh/lotte/ChamplainTechJournals
cd ~/champlaintechjournals/sysadmin-ii-sys265/configs/mgmt-01
echo $(hostname) > README.md
git add .
git commit -m "added a readme"
git push

• login with token authentication

web-01

• sudo yum install git
• create ssh key and connect to git with it (see above section)

mkdir -p linux/public-keys
mkdir -p linux/ubuntu
mkdir -p linux/centos7

• create secure-ssh.sh script