Ubuntu
synaptic package

Terminal Output: troubleshooting synaptic

Asked by wlgoode

You might want to run `apt-get -f install' to correct these.
The following packages have unmet dependencies:
  debian-edu-install: Depends: debian-edu-config (>= 0.380) but it is not installed
E: Unmet dependencies. Try using -f.
wlgoode@albert ~ $ sudo apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following extra packages will be installed:
  debian-edu-config
Recommended packages:
  memtest86
The following NEW packages will be installed:
  debian-edu-config
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
Need to get 0B/212kB of archives.
After this operation, 1839kB of additional disk space will be used.
Do you want to continue [Y/n]?
WARNING: The following packages cannot be authenticated!
  debian-edu-config
Authentication warning overridden.
Preconfiguring packages ...
(Reading database ... 145660 files and directories currently installed.)
Unpacking debian-edu-config (from .../debian-edu-config_1.423_all.deb) ...
 Removing any system startup links for /etc/init.d/loadcpufreq ...
dpkg: error processing /var/cache/apt/archives/debian-edu-config_1.423_all.deb (--unpack):
 trying to overwrite `/etc/lsb-release', which is also in package base-files
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Processing triggers for mintsystem ...
Errors were encountered while processing:
 /var/cache/apt/archives/debian-edu-config_1.423_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
wlgoode@albert ~ $ apt-get -f install

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marcobra (Marco Braida) (marcobra) said : 		#1

Always try

sudo apt-get update

when you get WARNING: The following packages cannot be authenticated!

But to fully check and upgrade your system using terminal using command line,
open a Terminal from the menu Applications->Accessories->Terminal

Tip: right click with mouse on the terminal title caption and select the item "Always on Top" doing this you will force the terminal window to stay on top of the other windows and you will find very easy to copy single row from this web page into the terminal...
Something more about using the terminal https://help.ubuntu.com/community/UsingTheTerminal

Then type or better copy and paste a row a time then press enter:
(Tip: select the single row to copy then right click into the terminal and to quick paste click with middle button of mouse )

sudo dpkg --configure -a
sudo apt-get -f install
sudo apt-get --fix-missing install
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get clean
sudo apt-get autoremove
sudo apt-get update

give your user password when requested, you don't see nothing when you type it, then press enter.

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