"E: Invalid operation update" error while running shell scripts in WSL

Question

I have a shell script called setup_wsl.sh which contains:

#!/bin/bash

echo "hai"
sudo apt-get update
sudo apt-get install \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg-agent \
    software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo apt-key fingerprint 0EBFCD88
sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"  
sudo apt-get update
sudo apt-get install docker-ce docker-ce-cli containerd.io

When i run the script as ./setup_wsl.sh in WSL ( installed distro is ubuntu 18.04), errors occur as:

hai
E: Invalid operation update
E: Unable to locate package
./setup_wsl.sh: 4: ./setup_wsl.sh: apt-transport-https: not found
./setup_wsl.sh: 5: ./setup_wsl.sh: ca-certificates: not found
curl: (3) Illegal characters found in URL
./setup_wsl.sh: 7: ./setup_wsl.sh: gnupg-agent: not found
: not found ./setup_wsl.sh: software-properties-common
: not found ./setup_wsl.sh:

The first command of the script works fine as it gives output "hai".

Can someone help me to find why these errors occured?

Answer 1

This is because of the carriage return in windows. Switch to the LF carriage with a text editor and save the new one to run the script or sed -i -e 's/\r$//' setup_wsl.sh

Answer 2

For any one who is using Notepad++ go to Edit => EOL Conversion => Unix(LF) same as show in the picture below

Answer 3

For VSCode, you just need to set it in the status bar

More details and options here https://qvault.io/clean-code/line-breaks-vs-code-lf-vs-crlf/