When running my bash script for setting ssh tunneling, it stops half

Question

The following is my bash script setting up ssh tunneling. However, it always stops when it get to the echo part. does anyone know why? My distro is ubuntu 20.

apt update && apt install -y wget && DEBIAN_FRONTEND=noninteractive apt-get install 
openssh-server -y && 
mkdir -p ~/.ssh && cd $_ &&
echo "ssh-ed25519 
AAAAC3NzaC1lZDI1NTE5AAAAII2AOiMJXSWr/yYuAkSur/QSfdwBbmK3hs4qzlMvOQxT dmml@Dmms-MBP" 
>> authorized_keys
&& service ssh start

thanks.

Answer 1

My response would be better placed in a comment, but I can't get the formatting right, so I'll post it here. The problem is likely due to a formatting issue. Splitting the string that's passed to the echo command over multiple lines is especially problematic. Try re-formatting as shown below, noting the backslash (\) at the end of each line. There's likely a better way to accomplish the goal than stringing a large number of commands together. Also, resist the temptation to use "set -e" here. See comments for additional details.

apt update && \
apt install -y wget && \
DEBIAN_FRONTEND=noninteractive apt-get installopenssh-server -y && \
mkdir -p ~/.ssh && \
cd $_ && \
echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAII2AOiMJXSWr/yYuAkSur/QSfdwBbmK3hs4qzlMvOQxT dmml@Dmms-MBP" >> authorized_keys && \
service ssh start