Is Synaptic Available for v16.04 LTS?

[Rick St. George]

I remember a while back after first upgrading to v16.04, we the community had trouble installing Synaptic Package Manager.

Tried again, it installed, here is the terminal output;

5723:/$ sudo apt-get install synaptic
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  libept1.5.0
Suggested packages:
  dwww deborphan
The following NEW packages will be installed:
  libept1.5.0 synaptic
0 upgraded, 2 newly installed, 0 to remove and 3 not upgraded.
Need to get 0 B/1,431 kB of archives.
After this operation, 7,376 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Selecting previously unselected package libept1.5.0:amd64.
(Reading database ... 344990 files and directories currently installed.)
Preparing to unpack .../libept1.5.0_1.1+nmu3_amd64.deb ...
Unpacking libept1.5.0:amd64 (1.1+nmu3) ...
Selecting previously unselected package synaptic.
Preparing to unpack .../synaptic_0.83_amd64.deb ...
Unpacking synaptic (0.83) ...
Processing triggers for libc-bin (2.23-0ubuntu9) ...
/sbin/ldconfig.real: /usr/lib/nvidia-375/libEGL.so.1 is not a symbolic link

/sbin/ldconfig.real: /usr/lib32/nvidia-375/libEGL.so.1 is not a symbolic link

Processing triggers for man-db (2.7.5-1) ...
Processing triggers for menu (2.1.47ubuntu1) ...
Processing triggers for desktop-file-utils (0.22-1ubuntu5.1) ...
Processing triggers for gnome-menus (3.13.3-6ubuntu3.1) ...
Processing triggers for mime-support (3.59ubuntu1) ...
Processing triggers for hicolor-icon-theme (0.15-0ubuntu1) ...
Setting up libept1.5.0:amd64 (1.1+nmu3) ...
Setting up synaptic (0.83) ...
Processing triggers for libc-bin (2.23-0ubuntu9) ...
/sbin/ldconfig.real: /usr/lib/nvidia-375/libEGL.so.1 is not a symbolic link

/sbin/ldconfig.real: /usr/lib32/nvidia-375/libEGL.so.1 is not a symbolic link

Processing triggers for menu (2.1.47ubuntu1) ...
5723:/$

but get the following ERROR message when it comes up!

E: The value 'trusty' is invalid for APT:: Default-Release as such a release is not available in the sources
E: _cache->open() failed, please report.

Any ideas? Is it still not available for v16.04 LTS? It seems some people were successful (see https://askubuntu.com/q/805430).

And if not, how can we check that all depedencies are installed for any particular program or to remove any program, etc.

Thanks!
Rick

[vasa1]

It's available!

$ apt policy synaptic
synaptic:
  Installed: 0.83
  Candidate: 0.83
  Version table:
 *** 0.83 500
        500 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
        100 /var/lib/dpkg/status
$

I've never had issues installing Synaptic Package Manager.

Your askubuntu links points to enabling Universe. Simple as that.

[Rick St. George]

Universe is enabled. Not simple as that !?!?!?

[vasa1]

Universe is enabled. Not simple as that !?!?!?

In your case apparently.

0 upgraded, 2 newly installed, 0 to remove and 3 not upgraded.

Let's see the output from

sudo apt-get update

and

sudo apt-get upgrade

and

grep -Ev '(^#|^ *$|deb-src)' /etc/apt/sources.list /etc/apt/sources.list.d/*

[deadflowr]

Your problem is this problem:
https://answers.launchpad.net/ubuntu/+question/255926
just change out the references of saucy and trusty to trusty and xenial.

[monkeybrain20122]

Did you upgrade from 14.04?

E: The value 'trusty' is invalid for APT:: Default-Release as such a release is not available in the sources

Seems that your sources has been messed up somehow.

gksudo gedit /etc/apt/sources.list

Change all occurrences of trusty to xenial

Then

sudo apt update

sudo apt install synaptic

[vasa1]

Your problem is this problem:
https://answers.launchpad.net/ubuntu/+question/255926
just change out the references of saucy and trusty to trusty and xenial.

Interesting! So this problem carried over to the trusty / xenial as well!

Should OP also run

sudo rm /etc/apt/apt.conf

as stated in comment #8?

[deadflowr]

Interesting! So this problem carried over to the trusty / xenial as well!

Should OP also run

sudo rm /etc/apt/apt.conf

as stated in comment #8?

I would think that would be a first step.
If nothing comes of it, then we'll look at other things...

[jeremy31]

What is the result for

ls /usr/lib/nvidia-375

[Rick St. George]

output of sources.list

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
###### Ubuntu Main Repos
deb http://archive.ubuntu.com/ubuntu/ xenial main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ xenial main restricted universe multiverse

###### Ubuntu Update Repos
deb http://archive.ubuntu.com/ubuntu/ xenial-security main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ xenial-updates main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ xenial-security main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ xenial-updates main restricted universe multiverse
# deb http://download.bitdefender.com/repos/deb/ bitdefender non-free

###### Ubuntu Partner Repo
deb http://archive.canonical.com/ubuntu xenial partner
deb-src http://archive.canonical.com/ubuntu xenial partner
# deb-src http://deb.opera.com/opera-stable/ stable non-free