7

While trying to compile a program with the following command:

g++ -o <output_file> <my_file.cpp>

I found the following report....

The program 'g++' can be found in the following packages:
 * g++
 * pentium-builder
 Try: sudo apt-get install <selected package>

Then I tried...

nawshad@ubuntu:~/Thesis/Codes/Thesis_Utility_Function/Test Codes$ sudo apt-get   install   g++
Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 g++ : Depends: g++-4.6 (>= 4.6.3-1~) but it is not going to be installed
 libqt4-opengl : Depends: libqtcore4 (= 4:4.8.1-0ubuntu4.1) but 4:4.8.1-0ubuntu4 is to be installed
                 Depends: libqtgui4 (= 4:4.8.1-0ubuntu4.1) but 4:4.8.1-0ubuntu4 is to be installed
 libqt4-svg : Depends: libqtcore4 (= 4:4.8.1-0ubuntu4.1) but 4:4.8.1-0ubuntu4 is to be installed
              Depends: libqtgui4 (= 4:4.8.1-0ubuntu4.1) but 4:4.8.1-0ubuntu4 is to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

I can't install due to unmet dependencies.

While updating, the following error occurs:

nawshad@ubuntu:~$ sudo apt-get update
[sudo] password for nawshad:
E: Could not get lock /var/lib/apt/lists/lock - open (11: Resource temporarily unavailable)
E: Unable to lock directory /var/lib/apt/lists/
E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?

I followed the instructions at Unable to lock the administration directory (/var/lib/dpkg/) is another process using it?), but the unmet dependencies are still not resolved.

mickmackusa
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MiNdFrEaK
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1 Answers1

7

Run:

sudo apt-get update

You should always run that before installing or upgrading packages on the command-line (unless you've run it very recently). It fetches information about what packages are available in what versions from where.

You may simply be able to install g++ now, but go ahead and do as Web-E says (after running the above command), to fix any currently broken dependencies:

sudo apt-get -f install

(The -f can actually go before or after the install; the effect is the same.)

Then try installing g++ again:

sudo apt-get install g++

If that still fails, please edit your question to show any error messages (and also the output of the above two commands when you ran them). But it should succeed.

Eliah Kagan
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