I'm updating my ubuntu but it can't update. This is the following problem attached in my terminal. Please help me to solve this problem.
Hi @rolandz9
Can you please give the full log when you run it in the terminal?
You can copy from the terminal using CTRL+SHIFT+C
Cheers
As said, please post the terminal output. A manpage reference is not very useful, the error code is 
That said, it sounds like your missing some keys. We will know for sure when you post the code. On the off chance I am right, run these lines in terminal (one line at a time).
sudo apt clean
cd /var/lib/apt
sudo mv lists lists.old
sudo mkdir -p lists/partial
sudo apt update
And welcome to our forums 
6 Likes
ubuntu@localhost:~$ sudo apt-get update
[sudo] password for ubuntu:
Hit:1 http://ppa.launchpad.net/danielrichter2007/grub-customizer/ubuntu xenial InRelease
Ign:2 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial InRelease
Hit:3 http://ppa.launchpad.net/longsleep/ubuntu-pine64-flavour-makers/ubuntu xenial InRelease
Ign:4 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial InRelease
Ign:5 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial Release
Ign:6 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial Release
Ign:7 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main arm64 Packages
Hit:8 http://ports.ubuntu.com xenial InRelease
Ign:9 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main armhf Packages
Hit:10 http://ports.ubuntu.com xenial-updates InRelease
Ign:11 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main all Packages
Hit:12 http://ports.ubuntu.com xenial-security InRelease
Hit:13 http://ports.ubuntu.com xenial-backports InRelease
Ign:14 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main Translation-en
Ign:15 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main arm64 Packages
Ign:16 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main armhf Packages
Ign:17 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main all Packages
Ign:18 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main Translation-en
Ign:7 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main arm64 Packages
Ign:9 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main armhf Packages
Ign:11 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main all Packages
Ign:14 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main Translation-en
Ign:15 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main arm64 Packages
Ign:16 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main armhf Packages
Ign:17 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main all Packages
Ign:18 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main Translation-en
Ign:7 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main arm64 Packages
Ign:9 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main armhf Packages
Ign:11 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main all Packages
Ign:14 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main Translation-en
Ign:15 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main arm64 Packages
Ign:16 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main armhf Packages
Ign:17 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main all Packages
Ign:18 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main Translation-en
Ign:7 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main arm64 Packages
Ign:9 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main armhf Packages
Ign:11 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main all Packages
Ign:14 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main Translation-en
Ign:15 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main arm64 Packages
Ign:16 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main armhf Packages
Ign:17 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main all Packages
Ign:18 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main Translation-en
Ign:7 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main arm64 Packages
Ign:9 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main armhf Packages
Ign:11 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main all Packages
Ign:14 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main Translation-en
Ign:15 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main arm64 Packages
Ign:16 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main armhf Packages
Ign:17 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main all Packages
Ign:18 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main Translation-en
Err:7 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main arm64 Packages
404 Not Found
Ign:9 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main armhf Packages
Ign:11 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main all Packages
Ign:14 http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial/main Translation-en
Err:15 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main arm64 Packages
404 Not Found
Ign:16 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main armhf Packages
Ign:17 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main all Packages
Ign:18 http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial/main Translation-en
Reading package lists... Done
W: The repository 'http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: The repository 'http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://ppa.launchpad.net/gwibber-daily/ppa/ubuntu/dists/xenial/main/binary-arm64/Packages 404 Not Found
E: Failed to fetch http://ppa.launchpad.net/noobslab/ppa-gimp/ubuntu/dists/xenial/main/binary-arm64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.your solution doesn't work, Iam getting same error.
Welcome to the forums.
What is the exact error you are getting?
What solution did you try?
Iam getting same error:
N: See apt-secure(8) manpage for repository creation and user configuration details
remove sources .list and index.html in /etc/apt dir
# cp /etc/apt/preferences.d/index.html /tmp
# rm -rf /etc/apt/preferences.d/index.html
#cp /etc/apt/sources.list /tmp
# rm -rf sources.list
then reboot
This will help us understand what in your sources.list is having issues.
apt-get update
Err:1 http://ftp.harukasan.org/kali kali-rolling InRelease
The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository
Reading package lists... Done
W: GPG error: http://ftp.harukasan.org/kali kali-rolling InRelease: The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
It looks like you are running Kali not Ubuntu MATE
You will probably find more specific support at the Kali forums
However, the error you are having looks to be an improper gpg key that you would need to update to the correct one that Kali uses to sign their packages.
Good luck
N: Ignoring file 'apt.strace' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
E: The repository 'http://ppa.launchpad.net/webupd8team/sublime-text-3/ubuntu bionic Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
Kindly,, i face this Error with Bash - Windows 10
could u please assist
please i'm having this same issue
i need help
please i having an issue with my ubuntu.
See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://ftp.us.debian.org/debian stretch Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 7638D0442B90D010 NO_PUBKEY 04EE7237B7D453EC NO_PUBKEY EF0F382A1A7B6500
E: The repository 'http://ftp.us.debian.org/debian stretch Release' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
sirhezzy@linux:~$
what should i do?4
See post's #2 and #3 and follow those steps.
i have same issue and followed steps but still having issue
......... Reading package lists... Done
W: GPG error: //http://repo.mongodb.org/apt/ubuntu precise/mongodb-org/3.0 Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 9ECBEC467F0CEB10
E: The repository '//http://repo.mongodb.org/apt/ubuntu precise/mongodb-org/3.0 Release' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
N: Skipping acquire of configured file 'main/binary-i386/Packages' as repository '//http://repo.mongodb.org/apt/debian buster/mongodb-org/4.2 InRelease' doesn't support architecture 'i386'
N: Skipping acquire of configured file 'main/binary-i386/Packages' as repository '//http://repo.mongodb.org/apt/debian buster/mongodb-org/4.4 InRelease' doesn't support architecture 'i386'
I am getting this error. Please do help me, tried all the possible ways
Welcome, @Moni_Shankar!
No offense, but there's so many things wrong here that it's hard for me to decide what to bring up first.
First, you didn't tell us what distribution you are using. Tell us the distribution (example: "Ubuntu MATE"), and the version (example: "20.04.1" or "focal").
Second, it's very weird that you seem to have PPAs for MongoDB intended for both Debian Buster and Ubuntu 12.04. What kind of system is this?
Third, there's many changes you should probably make to your /etc/apt/sources.list file, most notably the // preceding the http:// part of each URL should be removed. There is no reason to keep it there, I believe.
Finally, why do you want to install MongoDB 3.0 and 4.4? And it looks like the MongoDB packages are built for amd64 and i386 architectures but the repositories only expose the amd64 packages; if you're actually using an i386 system, contact the MongoDB developers about this weirdness. And if you're using amd64, change the i386 in the sources.list to amd64.
Again, please give us information about your setup like I asked for above. But you can in addition try the suggestions I made.
Hi @gordon
Thanks for replying, let me share you the details as u asked
1.The distribution is
Linux mx 4.19.0-14-amd64 #1 SMP Debian 4.19.171-2 (2021-01-30) x86_64 GNU/Linux.
2.Its a debian buster Debian GNU/Linux 10 (buster).
3.I added // because this community was not allowing me to post more than 2 links as I am new here, so I commented out this hyperlinks.
My main aim is to install mongodb and start the server and store some dummy data for my application.
Thanks in advance.