Raspberry Pi 4B installation and tshoot

## Clone a running OS from SD card to USD SSD, Raspberry 4B 8G

### Main guide
https://medium.com/xster-tech/move-your-existing-raspberry-pi-4-ubuntu-install-from-sd-card-to-usb-ssd-52e99723f07b

### References:
https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-boot-modes
https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-4-boot-flow
https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#raspberry-pi-4-boot-eeprom

### If necessary, deal with the SSD adaptor without UAS support (Argon one m2 does not have this issue)
https://www.helping.ninja/how-to-migrate-raspberry-pi-sd-card-to-a-usb-ssd-speedtest/

## Deal with Argon one m2 fan noise
- Set fan to run when temperature is high than 50 Celsius degree. Trying to keep temparature lower is hard.
- Remove the magnetic cover if necessary. This cover prevent the heat from flowing out.
- As confirmed by Reddit community, setting the jumper to mode 2-3 (direct flow) cause more heat on Pi. Use mode 1-2 reduce the heat
- Need more test: the thermal pad might need a little time before it can take effect.


## Setup

## [OS upgrade]
apt-get update -y
apt-get upgrade -y


## [Install necessary packages]
apt install apt-list mlocate vim nano fail2ban etherwake hddtemp lm-sensors -y
updatedb


## [Add normal user]
useradd -m <user>
passwd <user>


## [Install dwagent]
wget https://node896146.dwservice.net/getAgentFile.dw?name=dwagent.sh
mv getAgentFile.dw\?name\=dwagent.sh dwagent.sh
chmod 700 dwagent.sh 
./dwagent.sh 


## [Setup WOL] Must be run as root or sudo
vim ~/.bashrc

alias wakehome='sudo etherwake 30:85:A9:98:CB:4A'
alias temp='/usr/bin/vcgencmd measure_temp'


## [Secure SSHD]
vim /etc/ssh/sshd_config

Include /etc/ssh/sshd_config.d/*.conf
Port 22
AllowUsers user@192.168.1.* <user>@<IP x.x.x.x> <user2>@<IP x.x.x.x>
PermitRootLogin no
StrictModes yes
MaxAuthTries 3
PasswordAuthentication yes
PermitEmptyPasswords no
ChallengeResponseAuthentication no
UsePAM yes
PrintMotd no
AcceptEnv LANG LC_*
Subsystem       sftp    /usr/lib/openssh/sftp-server

sshd -t
systemctl restart sshd


## [Configre fail2ban] Block SSH attacker
apt install fail2ban -y
vim /etc/fail2ban/jail.local

[sshd]
mode = aggressive
[DEFAULT]
bantime = 180m
findtime = 15m
maxretry = 5

systemctl start fail2ban
systemctl enable fail2ban

fail2ban-client status
fail2ban-client status sshd
cat /var/log/fail2ban.log 
iptables -L
iptables -S
fail2ban-client set <jail-name> unbanip <ip-address>


## Argon one m2 fan control
wget https://download.argon40.com/argon1.sh
chmod 750 argon1.sh
./argon1.sh
argonone-config

#### Set fan to run if temperature is higher than 50 Celcius degree


## Get cpu temp, hdd temp:
sensors
temp
hddtemp


## Test run get metrics
vim loop.sh 

#!/bin/bash
while sleep 60; do python get-by-id-lite.py >> output.log; done

#### Run by &, then disown