curl -sL https://deb.nodesource.com/setup_4.x | sudo bash -

gistfile1.txt

$ cat nodesource.sh | sudo bash -

## Installing the NodeSource Node.js v4.x LTS Argon repo...


## Populating apt-get cache...

+ apt-get update
Hit http://ftp.uni-kl.de sid InRelease
Get:1 http://ftp.uni-kl.de sid/main Sources/DiffIndex [27.9 kB]
Get:2 http://ftp.uni-kl.de sid/non-free Sources/DiffIndex [27.8 kB]
Get:3 http://ftp.uni-kl.de sid/main amd64 Packages/DiffIndex [27.9 kB]
Get:4 http://ftp.uni-kl.de sid/non-free amd64 Packages/DiffIndex [27.8 kB]
Get:5 http://ftp.uni-kl.de sid/main Translation-en/DiffIndex [27.9 kB]
Get:6 http://ftp.uni-kl.de sid/non-free Translation-en/DiffIndex [27.8 kB]
Fetched 167 kB in 1s (114 kB/s)
Reading package lists... Done

## Installing packages required for setup: apt-transport-https lsb-release...

+ apt-get install -y apt-transport-https lsb-release > /dev/null 2>&1

## Confirming "jessie" is supported...

+ curl -sLf -o /dev/null 'https://deb.nodesource.com/node_4.x/dists/jessie/Release'

## Adding the NodeSource signing key to your keyring...

+ curl -s https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -
OK

## Creating apt sources list file for the NodeSource Node.js v4.x LTS Argon repo...

+ echo 'deb https://deb.nodesource.com/node_4.x jessie main' > /etc/apt/sources.list.d/nodesource.list
+ echo 'deb-src https://deb.nodesource.com/node_4.x jessie main' >> /etc/apt/sources.list.d/nodesource.list

## Running `apt-get update` for you...

+ apt-get update
Hit:1 http://ftp.uni-kl.de/debian sid InRelease
Get:2 https://deb.nodesource.com/node_4.x jessie InRelease [4634 B]
Get:3 https://deb.nodesource.com/node_4.x jessie/main Sources [763 B]
Get:4 https://deb.nodesource.com/node_4.x jessie/main amd64 Packages [962 B]
Fetched 6359 B in 0s (16.7 kB/s)
Reading package lists... Done

## Run `apt-get install nodejs` (as root) to install Node.js v4.x LTS Argon and npm