Error executing command, exiting

Staring from curl -sL https://deb.nodesource.com/setup_9.x | sudo -E bash -:

(dwiki-venv)dave@debian:~/dev/django-wiki$ sudo ./x.sh

## Installing the NodeSource Node.js 9.x repo...


## Populating apt-get cache...

+ apt-get update
Ign http://download.webmin.com sarge InRelease
Hit http://download.webmin.com sarge Release.gpg                                                                       
Hit http://download.webmin.com sarge Release                                                                           
Ign http://ftp.us.debian.org jessie InRelease                                                                          
Hit http://ftp.us.debian.org jessie-updates InRelease                                                                  
Hit http://download.webmin.com sarge/contrib amd64 Packages                                                            
Hit http://security.debian.org jessie/updates InRelease                                                                
Hit http://ftp.us.debian.org jessie Release.gpg                                                                        
Hit https://apt.dockerproject.org debian-jessie InRelease                                                              
Hit http://ftp.us.debian.org jessie Release                                                                            
Ign http://download.webmin.com sarge/contrib Translation-en_US                                                         
Ign http://download.webmin.com sarge/contrib Translation-en                                                       
Get:1 http://security.debian.org jessie/updates/main Sources [310 kB]                       
Ign http://ftp.debian.org jessie-backports InRelease                                                                   
Get:2 https://apt.dockerproject.org debian-jessie/main amd64 Packages [6,892 B]                                   
Ign http://webmin.mirror.somersettechsolutions.co.uk sarge InRelease                                              
Get:3 http://security.debian.org jessie/updates/main amd64 Packages [678 kB]                                           
Get:4 http://security.debian.org jessie/updates/main Translation-en [342 kB]                                           
Hit http://ftp.us.debian.org jessie/main Sources                                                                       
Get:5 https://apt.dockerproject.org debian-jessie/main Translation-en_US [454 B]                          
Ign http://ftp.debian.org jessie-backports Release.gpg                                                                 
Hit http://ftp.us.debian.org jessie/main amd64 Packages                                                                
Hit http://webmin.mirror.somersettechsolutions.co.uk sarge Release.gpg                                                 
Hit http://ftp.us.debian.org jessie/main Translation-en                                                                
Ign http://ftp.debian.org jessie-backports Release                                                                     
Hit http://webmin.mirror.somersettechsolutions.co.uk sarge Release
Get:6 https://apt.dockerproject.org debian-jessie/main Translation-en [454 B]         
Ign http://ftp.debian.org jessie-backports/main amd64 Packages/DiffIndex                                             
Get:7 https://apt.dockerproject.org debian-jessie/main Translation-en_US [454 B]                                     
Get:8 https://apt.dockerproject.org debian-jessie/main Translation-en [454 B]                                          
Get:9 https://apt.dockerproject.org debian-jessie/main Translation-en_US [454 B]                                       
Hit http://webmin.mirror.somersettechsolutions.co.uk sarge/contrib amd64 Packages                                      
Get:10 https://apt.dockerproject.org debian-jessie/main Translation-en [454 B]                                         
Get:11 https://apt.dockerproject.org debian-jessie/main Translation-en_US [454 B]                                     
Get:12 https://apt.dockerproject.org debian-jessie/main Translation-en [454 B]                                         
Get:13 https://apt.dockerproject.org debian-jessie/main Translation-en_US [454 B]                                      
Ign https://apt.dockerproject.org debian-jessie/main Translation-en_US                                                 
Get:14 https://apt.dockerproject.org debian-jessie/main Translation-en [454 B]                                         
Ign https://apt.dockerproject.org debian-jessie/main Translation-en              
Ign http://webmin.mirror.somersettechsolutions.co.uk sarge/contrib Translation-en_US
Ign http://webmin.mirror.somersettechsolutions.co.uk sarge/contrib Translation-en
Ign http://ftp.debian.org jessie-backports/main Translation-en_US
Ign http://ftp.debian.org jessie-backports/main Translation-en
Err http://ftp.debian.org jessie-backports/main amd64 Packages
  404  Not Found [IP: 130.89.148.12 80]
Fetched 6,892 B in 4s (1,533 B/s)        
W: Failed to fetch http://ftp.us.debian.org/debian/dists/jessie-updates/InRelease  Unable to find expected entry 'main/source/Sources' in Release file (Wrong sources.list entry or malformed file)

W: Failed to fetch http://ftp.debian.org/debian/dists/jessie-backports/main/binary-amd64/Packages  404  Not Found [IP: 130.89.148.12 80]

E: Some index files failed to download. They have been ignored, or old ones used instead.
Error executing command, exiting

uname -a:

Linux debian 3.16.0-4-amd64 #1 SMP Debian 3.16.43-2 (2017-04-30) x86_64 GNU/Linux

cat /etc/os-release:

PRETTY_NAME="Debian GNU/Linux 8 (jessie)"
NAME="Debian GNU/Linux"
VERSION_ID="8"
VERSION="8 (jessie)"
ID=debian
HOME_URL="http://www.debian.org/"
SUPPORT_URL="http://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

nodejs --version:

v0.10.29

[muxator]

@davidshumway, this is a problem setting up your linux environment.

1. E: Could not open lock file /var/lib/apt/lists/lock - open (13: Permission denied)

   This means either you are not root or (as likely) some sort of auto-updater in your distro is working in background. The nodesource script does not catch this error condition, and continues.

2. (dwiki-venv)dave@debian:~/dev/django-wiki$ sudo ./x.sh Are you running inside a python venv? This would mess up your PATH and environment variables. Deactivate it typing deactivate, you’ll notice that (dwiki-venv) will disappear from your prompt.

3. Err http://ftp.debian.org jessie-backports/main amd64 Packages […] W: Failed to fetch http://ftp.debian.org/debian/dists/jessie-backports/main/binary-amd64/Packages 404 Not Found [IP: 130.89.148.12 80]

   That’s a real http/404 (replicated on my side here). In which state is your debian installation?

I would advise solving these problems before attempting to install Etherpad.

[muxator]

Closing.