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I am trying to install Curl on Debian but unfortunately I get the following error:

The following packages have unmet dependencies: curl : Depends: libcurl3-gnutls (= 7.47.0-1) but 7.38.0-4+deb8u2 is to be installed E: Unable to correct problems, you have held broken packages.

I tried to solve that by using: sudo apt-get autoremove as another thread suggested it but I keep having the same issue.

How can I solve that ?

Edit:

Here's the output of apt-cache policy:

Package files:
 100 /var/lib/dpkg/status
     release a=now
 500 http://ftp.debian.org/debian/ testing/non-free Translation-en
 500 http://ftp.debian.org/debian/ testing/main Translation-en
 500 http://ftp.debian.org/debian/ testing/contrib Translation-en
 500 http://ftp.debian.org/debian/ testing/non-free amd64 Packages
     release o=Debian,a=testing,n=stretch,l=Debian,c=non-free
     origin ftp.debian.org
 500 http://ftp.debian.org/debian/ testing/contrib amd64 Packages
     release o=Debian,a=testing,n=stretch,l=Debian,c=contrib
     origin ftp.debian.org
 500 http://ftp.debian.org/debian/ testing/main amd64 Packages
     release o=Debian,a=testing,n=stretch,l=Debian,c=main
     origin ftp.debian.org
 500 http://security.debian.org/ jessie/updates/non-free Translation-en
 500 http://security.debian.org/ jessie/updates/main Translation-en
 500 http://security.debian.org/ jessie/updates/contrib Translation-en
 500 http://security.debian.org/ jessie/updates/non-free amd64 Packages
     release v=8,o=Debian,a=stable,n=jessie,l=Debian-Security,c=non-free
     origin security.debian.org
 500 http://security.debian.org/ jessie/updates/contrib amd64 Packages
     release v=8,o=Debian,a=stable,n=jessie,l=Debian-Security,c=contrib
     origin security.debian.org
 500 http://security.debian.org/ jessie/updates/main amd64 Packages
     release v=8,o=Debian,a=stable,n=jessie,l=Debian-Security,c=main
     origin security.debian.org
 500 http://mirrors.online.net/debian/ jessie/non-free Translation-en
 500 http://mirrors.online.net/debian/ jessie/main Translation-en
 500 http://mirrors.online.net/debian/ jessie/contrib Translation-en
 500 http://mirrors.online.net/debian/ jessie/contrib amd64 Packages
     release v=8.4,o=Debian,a=stable,n=jessie,l=Debian,c=contrib
     origin mirrors.online.net
 500 http://mirrors.online.net/debian/ jessie/non-free amd64 Packages
     release v=8.4,o=Debian,a=stable,n=jessie,l=Debian,c=non-free
     origin mirrors.online.net
 500 http://mirrors.online.net/debian/ jessie/main amd64 Packages
     release v=8.4,o=Debian,a=stable,n=jessie,l=Debian,c=main
     origin mirrors.online.net
Pinned packages:
     nginx -> 1.10.0-1

And here's the content of /etc/apt/sources.list:

# deb http://mirrors.online.net/debian jessie main

deb http://mirrors.online.net/debian jessie main non-free contrib
deb-src http://mirrors.online.net/debian jessie main non-free contrib

deb http://security.debian.org/ jessie/updates main contrib non-free
deb-src http://security.debian.org/ jessie/updates main contrib non-free

deb http://ftp.debian.org/debian/ testing main contrib non-free
deb-src http://ftp.debian.org/debian/ testing main contrib non-free
share|improve this question
2  
Could you edit your question to include the output of apt-cache policy? – Stephen Kitt May 29 at 16:20
    
Please add the output of cat /etc/apt/sources.list too. – GAD3R May 30 at 10:32
    
@StephenKitt I just edited my question. – Mehdi May 30 at 10:44
up vote 1 down vote

The libcurl3-gnutls (= 7.47.0-1) package come from testing and it is installed ,to fix curl's dependencies you need to downgrade libcurl3-gnutls version from 7.47 to 7.38 using aptitude (because it's more helpful than apt-get) .

Open the terminal and type the following command :

sudo aptitude -f install libcurl3-gnutls

Follow the instructions and choose to downgrade the package.

share|improve this answer
    
Thanks for your answer GAD3R ! Aptitude didn't gave me the option to just downgrade libcurl3-gnutls so i deleted it with sudo apt-get remove libcurl3-gnutls and then I installed the version needed by curl (7.38.0-4+deb8u3). – Mehdi May 30 at 16:06

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