In this post you’ll find a list of handy tips, tricks, and commands for your new Raspberry Pi 4.
I’ve been maintaining a document to record these so I can search and re-use them, and figured I’d share them on the blog for others to use as well.
Enable 64-Bit Kernel on Raspbian
Enables 64-bit kernel on Raspbian, however remember that the userspace is still 32-bit.
- Run “rpi-update” to make sure you’re running latest firmware and kernel.
- Add “arm_64bit=1” to “/boot/config.txt”
sudo echo arm_64bit=1 >> /boot/config.txt
Remove, comment out, or set the value to 0 to go back to a 32-bit kernel.
Get CPU Temperature on Raspbian
Run the command “sudo vcgencmd measure_temp” to get the CPU temperature on Raspbian.
[email protected]:~ $ sudo vcgencmd measure_temp temp=38.0'C
Get CPU Temperature on Ubuntu Server
Run the command “paste <(cat /sys/class/thermal/thermal_zone/type) <(cat /sys/class/thermal/thermal_zone/temp) | column -s $’\t’ -t | sed ‘s/(.)..$/.\1°C/'” as root to get the CPU temperature on Ubuntu Server.
[email protected]:~# paste <(cat /sys/class/thermal/thermal_zone/type) <(cat /sys/class/thermal/thermal_zone/temp) | column -s $'\t' -t | sed 's/(.)..$/.\1°C/' cpu-thermal 45.2°C
Add root CA (Certification Authority) certificates to the trust on Raspbian and Ubuntu Server
To add a root CA to your CA trust on your Linux instance, perform the following:
- Save your certificate as a friendly-filename.crt (CRT extension is important) and copy to “/usr/local/share/ca-certificates/”.
- Run the “update-ca-certificates” command as root or sudo.
Install Cockpit Remote Web Administration
To install cockpit on your Raspberry Pi, run the following command as root or sudo:
apt install cockpit
After this, login to Cockpit on your Pi by pointring your browser to https://PI-IP-ADDRESS:9090
To install the Target CLI to configure the iSCSI Target
In order to configure the Linux kernel iSCSI target, you need the “targetcli” application/binary.
To install on Raspbian, run the command as root or sudo:
apt install targetcli
To install on Ubuntu Server, run the command as root or sudo:
apt install targetcli-fb