Raspberry Pi Commands

format-and-mount-ssd.sh

# Find the device name using fdisk -l
# For example: /dev/sda
sudo fdisk -l

# Format the disk using fdisk
sudo fdisk /dev/sda

#Use the following commands shortcuts in fdisk:
#Create a new partition table : g (for GPT, use help for other format)
#Create a new partition : n
#You can keep the default values for a single partition
#Confirm with Y to remove the signature
#And finally write and exit fdisk: w

# Format the partition
sudo mkfs.ext4 /dev/sda1 #Best
# or
sudo mkfs.vfat /dev/sda1 #Only allows 4GB largest file size
# or
sudo mkfs.ntfs /dev/sda1

## Mount the drive 
# Create a new folder
sudo mkdir /media/ssd

# Manually mount the drive
sudo mount -t ext4 -o defaults /dev/sda1 /media/ssd

# Allow user pi to read/write/update
sudo chown -R pi:pi /media/ssd

# Unmount
sudo umount /media/ssd

## Auto mount on boot
# Get the UUID of the device using blkid or ls -l /dev/disk/by-uuid/
sudo blkid
# Insert the following line at the end of /etc/fstab
# UUID=<uuid-from-earlier> /media/usb ext4 defaults 0
# Do not enter quotes around the UUID
sudo vi /etc/fstab
# Example
UUID=c80fd6f4-4447-4fe0-a330-9b16a79a73f9 /media/ssd ext4 defaults 0

# Reboot
sudo reboot now

# Keep your fingers crossed

format-and-mount-usb.sh

# Find the device name using fdisk -l
# For example: /dev/sda
sudo fdisk -l

# Format the disk using fdisk
sudo fdisk /dev/sda

#Use the following commands shortcuts in fdisk:
#Create a new partition table : g (for GPT, use help for other format)
#Create a new partition : n
#You can keep the default values for a single partition
#Confirm with Y to remove the signature
#And finally write and exit fdisk: w

# Format the partition
sudo mkfs.ext4 /dev/sda1 #Best
# or
sudo mkfs.vfat /dev/sda1 #Only allows 4GB largest file size
# or
sudo mkfs.ntfs /dev/sda1

## Mount the drive 
# Create a new folder
sudo mkdir /media/usb

# Manually mount the drive
sudo mount -t ext4 -o defaults /dev/sda1 /media/usb

# Allow user pi to read/write/update
sudo chown -R pi:pi /media/usb

# Unmount
sudo umount /media/usb

## Auto mount on boot
# Get the UUID of the device using blkid or ls -l /dev/disk/by-uuid/
sudo blkid
# Insert the following line at the end of /etc/fstab
# UUID=<uuid-from-earlier> /media/usb ext4 defaults 0
# Do not enter quotes around the UUID
sudo vi /etc/fstab
# Example
UUID=c80fd6f4-4447-4fe0-a330-9b16a79a73f9 /media/usb ext4 defaults 0

# Reboot
sudo reboot now

# Keep your fingers crossed

kubernetes-node-issues.sh

# Node passwords are stored in the controller at:
sudo cat /var/lib/rancher/k3s/server/cred/node-passwd

# Node password are stored in the node at:
sudo vi /var/lib/rancher/k3s/agent/node-password.txt

# Issue: When a node is reimaged after an accident, rejoining was causing an issue where the sudo systemctl status k3s-agent
# was giving the following error.
# "Node password rejected, contents of '/var/lib/rancher/k3s/agent/node-password.txt"

# Copy pasting the node passwords from the controller to the server helped resolve this issue

miscellaneous.sh

# Get the hard disk parameters
sudo apt-get install hdparm
sudo hdparm -tT /dev/sda
# Result
# /dev/sda:
# Timing cached reads:   1816 MB in  2.00 seconds = 908.34 MB/sec
# Timing buffered disk reads: 1096 MB in  3.00 seconds = 364.89 MB/sec


# Get the operating temperature of Raspberry Pi
vcgencmd measure_temp

set-samba-nfs.sh

# Install the packages that is required to setup Samba by running the following command
sudo apt-get install samba samba-common-bin

# Create a folder that we will share
mkdir /media/ssd/shared
sudo chmod -R 777 /media/ssd/shared

# Modify the samba config file
sudo vi /etc/samba/smb.conf

# Within this file, add the following to the bottom. This text defines various details of our share.

[pi-nfs]
path = /media/ssd/shared
writeable=Yes
create mask=0777
directory mask=0777
public=no

# [pi-nfs]” – This defines the share itself, the text between the brackets is the point at which you will access the share. For example, ours will be at the following address: //raspberrypi/pimylifeupshare
# “path” – This option is the path to the directory on your Raspberry Pi that you want to be shared.
# “writeable” – When this option is set to “Yes“, it will allow the folder to be writable.
# “create mask” and “directory mask” – This option defines the maximum permissions for both files and folders. Setting this to 0777 allows users to read, write, and execute.
# “public” – If this is set to “no” the Pi will require a valid user to grant access to the shared folders.

# creating a Samba user called “pi” with the password set to your choice
sudo smbpasswd -a pi

# Start the samba service to start whenever the pi starts with:
sudo systemctl restart smbd

## Connect to the samba share on Mac by going to:
smb://my-pi-ip/pi-nfs

#############################################
## Connect to the samba share on another Pi

# Create a directory to mount the network file share in that folder
sudo mkdir /mnt/nfs

# Mount the nfs using the following
sudo mount -t cifs -o username=pi,password="your-samba-password",uid=pi,gid=pi //my-pi-ip/pi-nfs /mnt/nfs

# Unmount the file share using
sudo umount //my-pi-ip/nfs
 
# To Automount the network shares everytime on boot 
sudo vi /etc/fstab

# Add the following line at the end of the file
//my-pi-ip/pi-nfs /mnt/nfs cifs username=pi,password="your-samba-password",uid=pi,gid=pi 0 0

Start-minio.sh

# Reference: https://github.com/christianbaun/ossperf/wiki/Minio-on-a-Raspberry-Pi-3-with-Raspbian-(Debian-Jessie-8.0)

wget https://dl.minio.io/server/minio/release/linux-arm/minio
chmod +x minio
./minio server --address ":8080" /media/ssd/minio-data/