Questions tagged [certificates]
Questions about signed certificates and the processes involved (Creation, signing, accepting, viewing)
33
questions
372
votes
9
answers
928k
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How do I install a root certificate?
Can anyone point me to a good tutorial on installing a root certificate on Ubuntu?
I've been provided with a .crt file. I gather that need to create a directory at /usr/share/ca-certificates/...
46
votes
9
answers
91k
views
Add certificate authorities system-wide on Firefox
I want to add some root CAs that doesn't come with the default firefox on Ubuntu, but I don't know how.
I tried adding them to the local certificates with certutil, but it didn't work. It messed up ...
25
votes
6
answers
57k
views
Certificate error when using Citrix Receiver
I am getting this error when attempting to load a Desktop module up within Citrix Receiver:
What I don't understand is I can see this particular certificate is set to "Trust.." under any/all ...
157
votes
7
answers
674k
views
How to install certificates for command line
So in school we need to install a certificate to access https sites. In firefox, I can import the certificate. However, I can't do so with the command line. For example, running git push I get:
fatal:...
19
votes
4
answers
33k
views
How do I make a digital certificate available to LibreOffice Writer for digital signatures?
I obtained a client certificate from CAcert through Firefox. I want to use that certificate to sign a document created with LibreOffice Writer.
In Writer, I click File > Digital Signatures... to ...
10
votes
1
answer
55k
views
Problem with certificates
I'm with problems with ca-certificates. Every site that I try to access ask me for a confirmation of the certification and my update is not working 100% too
$ sudo rm -rf /etc/ssl/certs/*
$ sudo ...
-1
votes
1
answer
5k
views
Update the certificates on Ubuntu 16.04 TLS [closed]
I have an impression that ca-certificates on Ubuntu 16.04 LTS is outdated.
Today I tried to do:
sudo apt update
sudo apt-get install apt-transport-https ca-certificates -y
but none was updated:
...
26
votes
1
answer
116k
views
How does one remove a certificate authority's certificate from a system?
The ca-certificates package was just updated, and it caused the following changes on my Xubuntu 13.10 system:
Running hooks in /etc/ca-certificates/update.d....
Adding debian:CA_Disig_Root_R1.pem
...
58
votes
13
answers
138k
views
How do I digitally sign a PDF with a S/MIME certificate?
I have already acquired a S/MIME certificate (a .p12 file) issued by an authority. Using it in Writer, I can digitally sign documents by following this procedure : How do I make a digital certificate ...
35
votes
1
answer
37k
views
What is the use/purpose of the ca-certificates package?
I have always wondered what it's used for but I found little documentation about it.
4
votes
2
answers
28k
views
How do you set up Let's Encrypt SSL certificates for additional ports in Apache? [closed]
I would like to find out how to set up Let's Encrypt on an Apache2 web server on ports that are not 443. In the past, I have been successful in the past using CertBot to automatically set up port 443. ...
17
votes
1
answer
9k
views
List and remove unofficially installed CA certificates
This article expose how around 18% of HTTPS connections are being detected as intercepted by MITM proxies. As the great related paper states:
To circumvent this validation, local software injects a ...
7
votes
6
answers
19k
views
download.01.org certificate verification failed - CRLfile missing?
So I had intel-Linux-graphics-installer on my computer
but lately when I
sudo apt-get update
I get the following error
Err https://download.01.org trusty/main amd64 Packages ...
6
votes
2
answers
3k
views
Where should a non-administrative user save a CA certificate?
I have a CA certificate that I use to connect to a WPA2 Enterprise wireless network.
Where within my home folder should I store the .crt file? I don't see anything in the Filesystem Hierarchy ...
6
votes
1
answer
2k
views
How do I distribute a CA certificate using a Debian package?
The usual method of adding your own CA certificate to Ubuntu is:
cp cert.pem /usr/local/share/ca-certificates
update-ca-certificates
I'd like to distribute my CA certificate using a Debian package, ...
4
votes
1
answer
7k
views
Integrity: problem loading X.509 certificate -65 before login
I was able to clean any error displayed before log into Ubuntu 20.04.1.
I am using the newest Kernel version 5.9.1 , because my Lenovo had issues with graphic drivers at actual stable version.
I am ...
1
vote
1
answer
4k
views
How to enable TLS Client Certificate Authentication in Evolution?
I access my contacts via WebDav on the work LAN in evolution. Recently these contacts are also available via https and client certificate.
I have added the certificate authority and client ...
0
votes
3
answers
8k
views
Citrix Error "You have not trusted certificate"
I'm having a problem. I installed Citrix receiver icaclient 13.1.0.285639 in a machine running Ubuntu 14.04 LTS. I'm attempting to access my Citrix applications, but I get the following error:
`You ...
16
votes
2
answers
43k
views
Disable SSL certificate validation in Ubuntu totally
I am new to Linux and learning Linux on Ubuntu 18.0401 LTS installed on oracle virtualbox on company system. Company has private proxy network. So all the websites I browse on ubuntu pass through ...
14
votes
1
answer
9k
views
Why can't I import keys into the gnome keyring?
I'm trying to import a private key + certificate into my gnome key ring on Ubuntu 14.10, but the seahorse gui application won't let me, the 'import' button is greyed out:
If I try it from the command ...
9
votes
1
answer
23k
views
Fake UserTrust.com Certificates in Chrome?
I was trying to install a SSL certificate, when I digged into Chrome Settings and looked at the installed ones (servers tab).
Those are marked as Not Safe, and they are related to mail.google.com, ...
8
votes
1
answer
10k
views
How can I add an SSL client certificate/key globally in Ubuntu?
I have a web server which requires a client certificate to establish an SSL connection (SSLVerifyClient require in apache). In firefox or chrome, I simply import the .p12-file containing my ...
7
votes
4
answers
4k
views
Why does Empathy say my connection is untrusted?
Today when I opened Empathy on Ubuntu 10.10 I got this unusual error box. I have never got this warning about an untrusted connection before.
What should I do? Is it a security risk if I continue ...
6
votes
1
answer
6k
views
Does Ubuntu update its root certificate authority list automatically?
Will the root CA list become outdated if I never restart/upgrade the OS? Or does Ubuntu periodically update the root CA list in the background automatically (without restart/upgrade)?
5
votes
1
answer
5k
views
How do I create a PGP Key Revocation Certificate in Seahorse
I created a PGP Key using Seahorse in Ubuntu's Passwords and Keys (13.04). To my understanding, creating a revocation certificate for the PGP key is important for a couple of reasons.
I don't see any ...
5
votes
1
answer
17k
views
SSL Certificate error when adding PPA [closed]
I've been trying to install a package from a PPA for some hours now. I am running a freshly installed version of ubuntu 14.04.
I've been following these instructions:
https://github.com/ethereum/go-...
3
votes
1
answer
1k
views
LibreOffice fails to access my personal certificate
Recently, I updated my personal certificate. Then I wanted to sign a libreoffice document.
I followed the instructions from Part 1 to Part 4. Both Thunderbird and Firefox are displaying the correct, ...
2
votes
1
answer
1k
views
Can I use gpg on both Ubuntu and Windows to encrypt my files
I have a private gpg key for Ubuntu.
My question is: How can I use same encryption key for both Windows and Ubuntu?
If I use gpg in Ubuntu, can I use that same gpg key with Windows or vice versa? ...
1
vote
1
answer
2k
views
wget interrupted by a certificate problem
I wanted to download a file using wget https://curl.haxx.se/download/archeology/curl-7.16.2.tar.gz. Done that from a friend's PC and got no errors.
However, when trying to do so from my PC, on which ...
1
vote
0
answers
495
views
Problem with server access by error in certificate
I access a virtual machine for work through Citrix. When I log in from Ubuntu I get the same error from Firefox and Chromium (I've also tried it from Fedora, Mandriva, OpenSUSE, Debian ... and with ...
1
vote
2
answers
5k
views
Can't install python-pip
I can't install the package. I tried it with the command 'sudo apt-get install python-pip python-dev build-essential'
and I got the output:
Reading package lists... Done
Building dependency tree
...
1
vote
1
answer
608
views
How can I add a CA at an Ubuntu Phone
I want to syncronise my owncloud server with my new Ubuntu Phone. Therefore I would like to use syncevolution. The server uses a self signed certificate which I would have to add to my ca-certificates ...
0
votes
1
answer
955
views
Become a trusted Certificate Authority in Ubuntu
Is it possible to become a trusted Certificate Authority in Ubuntu?
And if yes, how?
This would be really nice.