Error moc: could not exec '/usr/lib/x86_64-linux-gnu/qt4/bin/moc': No such file or directory

When i try to run 'moc' on the command line, i got an error saying "moc: could not exec '/usr/lib/x86_64-linux-gnu/qt4/bin/moc': No such file or directory". How to fix this issue?

The application Synapse has closed unexpectedly

This morning when i open synapse and then i click on something, synapse just went crazy, it's showing error 'The application Synapse has closed unexpectedly'. I have no idea what's going on.

How to remove broken PPA repo on Ubuntu

There are times when the PPA repo that you add to your local machine becomes obsolete, maybe the developer abandoned the project or something happened, so how to remove these broken PPA repo anyway?

Ubuntu error Could not get lock /var/lib/dpkg/lock

When you try to run 'sudo apt-get update', sometimes you will get error that says something like this: '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?'.

Workbench error 'Cannot start SSH tunnel manager'

This morning i got an error when i try to open mysql workbench on my desktop pc running ubuntu 14.04, the error was 'Cannot start SSH tunnel manager'. This happened every time i try to connect to any MySQL database server, even the one on localhost.

Sorry, Ubuntu 16.04 has experienced an internal error

This morning my laptop which runs ubuntu 16.04 just crash, when i look at the detail of the error, i saw the program that makes the error was 'gnome-software'.

Boot error when creating Live USB using unetbootin

I have just download ubuntu 16.04 disk image (ISO) and i want to create a live usb stick, i use program called unetbootin to create the live usb stick.

How to install and uninstall program on Ubuntu

If you came from other operating system for example windows and mac, you might be little confuse on how to install and uninstall software/program on ubuntu, because ubuntu it's totally different from those two.

Error when playback videos on Ubuntu 15.10

 

I have ubuntu 15.10 on my laptop (fresh install) and when i try to open videos/movie i get an error message like this:

Required plugin could not be found
Videos requires to install plugins to play files of the following types:

MPEG-4 AAC decoder
H.264 (Main Profile) decoder

How to fix this issue??