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howto:setup-sscs-linux-account-public-keys [2025/03/12 17:04] – [One-stop script to create the sscs account] jnilssonhowto:setup-sscs-linux-account-public-keys [2026/07/21 21:30] (current) – [One-stop script to create the socit user account] jnilsson
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-====== How to: setup SSCS account with SSH public-key authentication ======+====== How to: setup SocIT account with SSH public-key authentication ======
  
 On linux servers, it is recommended to use public-key authentication rather than password authentication for SSH. This is especially true for when port 22 or SSH will be open to off-campus access through the UCI border firewall. On linux servers, it is recommended to use public-key authentication rather than password authentication for SSH. This is especially true for when port 22 or SSH will be open to off-campus access through the UCI border firewall.
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   * [[https://www.ssh.com/academy/ssh/public-key-authentication|General info about SSH Public Key Authentication]]   * [[https://www.ssh.com/academy/ssh/public-key-authentication|General info about SSH Public Key Authentication]]
  
-===== One-stop script to create the sscs account =====+===== One-stop script to create the socit user account =====
  
 You can simply copy and paste the below code to download a script that we've set up for this purpose and execute it with sudo: You can simply copy and paste the below code to download a script that we've set up for this purpose and execute it with sudo:
  
 <code> <code>
-curl -O -L https://sites.socsci.uci.edu/~jnilsson/sscs/setup-sscs-account.sh +curl -O -L https://sites.socsci.uci.edu/~jnilsson/sscs/setup-socit-account.sh 
-chmod +x ./setup-sscs-account.sh +chmod +x ./setup-socit-account.sh 
-sudo ./setup-sscs-account.sh+sudo ./setup-socit-account.sh
 </code> </code>
  
 Or if you prefer to run commands yourself, these are the equivalent commands: Or if you prefer to run commands yourself, these are the equivalent commands:
 <file> <file>
-SSCS_HOME=/home/sscs +SOCIT_HOME=/home/socit 
-sudo useradd -c "Computing Services" -m -d $SSCS_HOME -s /bin/bash sscs +sudo useradd -c "Computing Services" -m -d $SOCIT_HOME -s /bin/bash socit 
-echo "sscs    ALL=(ALL)   ALL" | sudo tee /etc/sudoers.d/sscs > /dev/null +echo "socit    ALL=(ALL)  NOPASSWD: ALL" | sudo tee /etc/sudoers.d/socit > /dev/null 
-sudo mkdir -p $SSCS_HOME/.ssh +sudo mkdir -p $SOCIT_HOME/.ssh 
-sudo chmod 700 $SSCS_HOME/.ssh +sudo chmod 700 $SOCIT_HOME/.ssh 
-sudo touch $SSCS_HOME/.ssh/authorized_keys +sudo touch $SOCIT_HOME/.ssh/authorized_keys 
-sudo chmod 600 $SSCS_HOME/.ssh/authorized_keys +sudo chmod 600 $SOCIT_HOME/.ssh/authorized_keys 
-echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPWfC91AllbEn9VYT9a0838A/55rWtrSY/dm48fedc38 jnilsson@storgy.local" | sudo tee -a $SSCS_HOME/.ssh/authorized_keys +sudo chown -R socit:socit $SOCIT_HOME/.ssh 
-echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDoygQr0UQLtpguLWJYiEBZWXUFEkUXVacE6sBZtn/6Z jnilsson@devjpn" | sudo tee -a $SSCS_HOME/.ssh/authorized_keys +echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPWfC91AllbEn9VYT9a0838A/55rWtrSY/dm48fedc38 jnilsson@storgy.local" | sudo tee -a $SOCIT_HOME/.ssh/authorized_keys 
-echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKH3jg7avVgdyx1jltUp9nJ02DOE9XH3hfcGBQI6KrVs sscs@gunship" | sudo tee -a $SSCS_HOME/.ssh/authorized_keys +echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDoygQr0UQLtpguLWJYiEBZWXUFEkUXVacE6sBZtn/6Z jnilsson@devjpn" | sudo tee -a $SOCIT_HOME/.ssh/authorized_keys 
-echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBqAc8VSY9DFEzzumkn1d2S1ytpYOWHSJkbOWN1HjFQR sscs@crateria" | sudo tee -a $SSCS_HOME/.ssh/authorized_keys +echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKH3jg7avVgdyx1jltUp9nJ02DOE9XH3hfcGBQI6KrVs sscs-hyen@gunship" | sudo tee -a $SOCIT_HOME/.ssh/authorized_keys 
-echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIC4u9RrufB93/AS2lsBVet4+U5rizO8noDKTSHhcLmli justip6@Zaire" | sudo tee -a $SSCS_HOME/.ssh/authorized_keys +echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBqAc8VSY9DFEzzumkn1d2S1ytpYOWHSJkbOWN1HjFQR sscs-hyen@crateria" | sudo tee -a $SOCIT_HOME/.ssh/authorized_keys 
-echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIErG9uQN2VUNqIjNowRw1J18T8dORd2HhJi3zl9Vs7+t justip6@zeon.ss2k.uci.edu" | sudo tee -a $SSCS_HOME/.ssh/authorized_keys+echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEGs3wce3UKRBTVLzpSi7/TR8odzoUlwbA3dubzssJ9V justip6@zaire" | sudo tee -a $SOCIT_HOME/.ssh/authorized_keys 
 +echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIErG9uQN2VUNqIjNowRw1J18T8dORd2HhJi3zl9Vs7+t justip6@zeon.ss2k.uci.edu" | sudo tee -a $SOCIT_HOME/.ssh/authorized_keys 
 +echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMtdfuw5hq6naiRnVCAKEUhpYTazWC5WE7rxCcXLN/cU lhtran@bahamut-zero.local" | sudo tee -a $SOCIT_HOME/.ssh/authorized_keys 
 +echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIK5DC1gTDzQtcNhvoCkgUzsf7ntvP/Ldac3EAgZ9Y/yc soceco\lmonzon@TECDSHHS9WX3" | sudo tee -a $SOCIT_HOME/.ssh/authorized_keys 
 +echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEmz0CBswz6AUtH/AzheFKOOtykNJ9hkGoE4IK+NkxAg dfiorell@ark" | sudo tee -a $SOCIT_HOME/.ssh/authorized_keys
 </file> </file>
  
-If you don't want the home directory to be /home/sscs, you can easily set your own SSCS_HOME variable to whatever location you choose and then copy/paste the rest of the commands. Or if you download the ''setup-sscs-account.sh'' script and you want to change the location of the sscs account home directory, modify the script accordingly before executing it.+If you don't want the home directory to be /home/socit, you can easily set your own SOCIT_HOME variable to whatever location you choose and then copy/paste the rest of the commands. Or if you download the ''setup-socit-account.sh'' script and you want to change the location of the socit account home directory, modify the script accordingly before executing it.
  
  
 ===== How to: Disable SSH Password Authentication ====== ===== How to: Disable SSH Password Authentication ======
  
-Disabling Password Authentication is generally as simple as setting the option ''PasswordAuthentication no'' in the /etc/ssh/sshd_config file and then restarting the sshd service.+After you have set up SSH keys for all your user accounts on a server that has port 22 open to the world, it is recommended to disable password authentication for increased security.
  
-However, we've discovered that some linux distributions add another configuration file **/etc/ssh/sshd_config.d/50-cloud-init.conf** which contains ''PasswordAuthentication yes'' to force password authentication to be enabled.+Disabling Password Authentication is generally as simple as setting the option ''PasswordAuthentication no'' in the /etc/ssh/sshd_config file and then restarting the sshd service. However, we've discovered that some linux distributions add another configuration file **/etc/ssh/sshd_config.d/50-cloud-init.conf** which contains ''PasswordAuthentication yes'' to force password authentication to be enabled.
  
 Therefore, the easiest way to universally disable password authentication is to create a new file that sorts lexicographically before any other files that might be created in there, such as **00-disable-password-auth.conf**: Therefore, the easiest way to universally disable password authentication is to create a new file that sorts lexicographically before any other files that might be created in there, such as **00-disable-password-auth.conf**:
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   * on Debian/Ubuntu:<code>   * on Debian/Ubuntu:<code>
-systemctl reload ssh+sudo systemctl reload ssh
 </code> </code>
   * on RHEL/Rocky:<code>   * on RHEL/Rocky:<code>
-systemctl reload sshd+sudo systemctl reload sshd
 </code> </code>
  
howto/setup-sscs-linux-account-public-keys.1741799098.txt.gz · Last modified: 2025/03/12 17:04 by jnilsson