Update
sudo apt-get update
Upgrade
sudo apt-get upgrade
Update + Upgrade
sudo apt-get update && sudo apt-get full-upgrade
Raspberry Pi Configuration
sudo raspi-config
Reboot
sudo reboot
Install Firefox
sudo apt-get install iceweasel 
Install Browser Plug-ins (flash ect,)
sudo apt-get install browser-plugin-gnash
Install RRD Tool
sudo apt-get install rrdtool
Install MRTG
sudo apt-get install mrtg
Install Apache
sudo apt-get install apache2
Install Synaptic (Package Manager)
sudo apt-get install synaptic
Install IPERF
sudo apt-get install iperf
Identify USB connected devices
sudo lsusb
Show Network Configuration
sudo ifconfig
Edit Network Interfaces
sudo nano /etc/network/interfaces
Install i2c support
sudo apt-get install python-smbus i2c-tools
Check Devices Connected to i2c Bus
sudo i2cdetect -y 1
Check Kernal Version
sudo uname -a
Raspbian Upgrade (Stretch to Buster)
 
grep -rl stretch /etc/apt/ | sudo xargs sed -i 's/stretch/buster/g'
 
sudo apt-get update && sudo apt-get upgrade -y
 
sudo apt-get update && sudo apt-get full-upgrade -y
 
sudo apt-get autoremove -y && sudo apt-get autoclean
 
sudo rpi-update
   
Speedtest
 
sudo apt-get update
 
sudo apt-get install python-pip
 
sudo pip install speedtest-cli
sudo git clone https://github.com/HenrikBengtsson/speedtest-cli-extras.git
cd speedtest-cli-extras/bin
 
./speedtest-csv