§2024-06-04

Build a new rpi3 Model B

1. First boot, change default user ubuntu password, b10nnnnnn8

2. sudo passwd root to b2nnnnnn5

3. fix ssh in with error Permission denied (publickey)

• fix `/etc/ssh/sshd_config

PasswordAuthentication yes        <-- originally commented out

KbdInteractiveAuthentication yes  <-- default is no

• then restart sudo systemctl restart ssh

4. change machine name to rpi3HAProxy.yushei.net

$ cat /etc/hostname 
pi3HAProxy.munetaka.me

5. adduser

ubuntu@pi3HAProxy:~$ sudo useradd -u 1026 -m -s /bin/bash alexlai
ubuntu@pi3HAProxy:~$ sudo usermod -aG sudo alexlai
ubuntu@pi3HAProxy:~$ id alexlai
uid=1026(alexlai) gid=1026(alexlai) groups=1026(alexlai),27(sudo)
ubuntu@pi3HAProxy:~$ ls -l /home/alexlai/
ls: cannot open directory '/home/alexlai/': Permission denied
ubuntu@pi3HAProxy:~$ sudo ls -l /home/alexlai/
total 0
ubuntu@pi3HAProxy:~$ sudo ls -l /home/
total 8
drwxr-x--- 2 alexlai alexlai 4096 Jun  4 10:34 alexlai
drwxr-x--- 5 ubuntu  ubuntu  4096 Jun  4 10:15 ubuntu
ubuntu@pi3HAProxy:~$ sudo passwd alexlai
New password: 
Retype new password: 
passwd: password updated successfully

6. run update

alexlai@pi3HAProxy:~$ sudo apt update && sudo apt -y upgrade

7. change time zone

alexlai@pi3HAProxy:~$  timedatectl
               Local time: Tue 2024-06-04 11:09:26 UTC
           Universal time: Tue 2024-06-04 11:09:26 UTC
                 RTC time: n/a
                Time zone: Etc/UTC (UTC, +0000)
System clock synchronized: yes
              NTP service: active
          RTC in local TZ: no
alexlai@pi3HAProxy:~$ sudo timedatectl set-timezone Asia/Taipei
[sudo] password for alexlai: 
alexlai@pi3HAProxy:~$ date
Tue Jun  4 19:09:57 CST 2024