learn-raspberrypi

Doc - Learn Ubuntu: Click here

Last update all notes on: 17 Feb, 2024

Download & Play mp3 file

• Youtube to mp3: Click here

Date: 19 Jan, 2024

NOTE: For some reason the mp3 jack isn't working with ubuntu, but the connection with bluetooth works which is actually awesome though because I can keep it near me all the time. Yikes.

# Download sample mp3 file
wget https://download.samplelib.com/mp3/sample-3s.mp3

# Play mp3 file with ffmplay utility:
# Install ffmpeg
sudo apt install ffmpeg
# Play mp3 file:
ffplay -nodisp ./sample-3s.mp3

# With sax:
# Installation: ```
sudo apt-get install sox libsox-fmt-all

# Play mp3 file:
play sample-3s.mp3

---

Active host: pi-sahil1.ddns.net

Know about system: hostnamectl command.

Current port forwards

80 and 3001-> 3010

Can't fix port mapping ? Possible reasons:

• You have defined multiple port forwards for the same port number. ( :LOL: This was the issue for me )

Files

File: ~/.bashrc-extended. I have source ~/.bashrc-extended command in my ~/.bashrc file.

alias temperature='/opt/vc/bin/vcgencmd measure_temp'
alias c='clear'
alias ...='. ~/.bashrc'
alias vi.bashrc-extended='vi ~/.bashrc-extended'
alias ..='cd ..'

Note

top
stress -c 8

noip2

Dynamic update client docs here.

noip2 			# Runs noip2 service.
noip2 -h 		# Shows help from noip2

noip2 -S 		#Shows status: *Use sudo to run command in root mode
			# coz first time after creating a configuration it 
			# doesn't without sudo prefixed, yikes!
			
			# If above command says configuratio file is in use by process <ID>. FIX: Simply kill the process by `kill <ID>` and then it would work.
			# In the process of creating a config file it'll ask for update inteval time you can choose default(30mins) by simply pressing Enter but 			 # its' good to use 10mins.
			
noip2 -K 702 		# Delete an existing configuration running task.
sudo noip2 -C 		# Use this command to create a new config after terminating a existing running process.

IMPORTANT After installating noip2 give read permission to the configuration file to all the users by below command, and the .profile file would be able to run use the configuration without any silly error, yikes!!

sudo chmod +rwx /usr/local/etc/no-ip2.conf

Install nvm on pi-os

sudo apt install curl 
curl https://raw.githubusercontent.com/creationix/nvm/master/install.sh | bash 
source ~/.profile

# Install node v14
nvm install 14

Source