1
vote
1answer
82 views

Not able to install unity-tweak-tool in Ubuntu 14.04 [duplicate]

Installation of Unity-tweak-tool is stuck at 0% and showing nothing. I've to press CTRL+C to stop. I've checked internet connection and it is working fine.
1
vote
1answer
48 views

apt-get upgrade gives GPG Error [duplicate]

How would I go about fixing this error? I have pycharm installed through a ppa that I have been using for years in various computers. W: GPG error: http://ppa.launchpad.net/mystic-mirage/pycharm/...
0
votes
1answer
120 views

Apt-Get Update Not Working, Can't Read Log

For some reason, when I try to use sudo apt-get update, it fails, and gives me this: user@my-computer:~$ sudo apt-get update Hit:1 http://us.archive.ubuntu.com/ubuntu xenial InRelease Ign:2 http:/dl....
47
votes
2answers
18k views

There is no public key available for the following key IDs 1397BC53640DB551 [duplicate]

When I run the command: sudo apt-get update I got this following warning: There is no public key available for the following key IDs: 1397BC53640DB551 This is the only warning I got and I do not ...
0
votes
0answers
42 views

How to get rid of this post “requires installation of untrusted packages”? [duplicate]

i know that there are have been some answers on this issue. But i have already tried some of them and without success. I don't know why but every time when i turn my laptop on i got this message. ...
1
vote
0answers
24 views

sudo apt-get update error in 14.04 LTS [duplicate]

I get this error when I run the above command. W: GPG error: http://packages.ros.org trusty InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY ...
-2
votes
1answer
93 views

2 warnings 1 error while using sudo apt-get update [duplicate]

Whenever i try sudo apt-get update I get following messages: W: GPG error: http://download.opensuse.org Release: The following signatures couldn't be verified because the public key is not available:...
0
votes
1answer
324 views

How can I get rid of this NO_PUBKEY errors?

sudo apt-get update is giving me this error at the end. I'm using "Y PPA Manager" and it seems that now all PPA's are O.K., but the problem (I think) is with the official Ubuntu repos: W: GPG error: ...
0
votes
0answers
10 views

I am getting tons of NO_PUBKEY Errors [duplicate]

I am trying to update the package database via sudo apt-get update, but I am getting many NO_PUBKEY errors, I have tried importing the keys with apt-key and gpg, with no luck. I have used Y PPA ...
2
votes
2answers
82 views

Software & Updates (software-properties-gtk): 'EOFError: marshal data too short'

I cannot open Software & Updates tool on 14.04 and get the following error: Here is the full output of apt-get update, it shows this warning: W: GPG error: http://dl.bintray.com Release: The ...
0
votes
0answers
123 views

Some index files failed to download. They have been ignored, or old ones used instead

I'm quite new to linux and I've been facing a lot of prob. Every single time I use sudo apt-get update I get the following output: (I apologize for not being able to upload it here directly ...
0
votes
0answers
12 views

Error on updating Ubuntu [duplicate]

Every time I run an update, I get this at the end of an update. Being a relatively new-user, this hardly makes any sense to me. Could someone please point out to what exactly does this mean? W: GPG ...
1
vote
0answers
72 views

Apt-get commands won't work

On my ubuntu 15.04 server the apt-get command won't work. I think it has something to do with perl. Does anyone know how to fix it? I've already tried apt-get -f install, but that outputs the same ...
1
vote
0answers
16 views

Errors during apt-get update [duplicate]

Software center and synaptics got broken somehow. I seem to have it fixed through sourses.list but I'm getting errors when I run sudo apt-get update. (Screenshot will be coming soon)
0
votes
0answers
334 views

ubuntu 15.10 mate update ERROR [duplicate]

W: GPG error: http://download.opensuse.org Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 977C43A8BA684223 W: Failed to fetch http://ppa....

15 30 50 per page