How to fix Unknown media type in type all/all and more due to kde.xml in Linux

If you get the below errors and are not using the KDE desktop environment, it could be that you installed some KDE program like Okular and then removed it, as a result it caused the mime types to give following errors: Unknown media type in type 'all/all' Unknown media type in type 'all/allfiles' Unknown media … Continue reading How to fix Unknown media type in type all/all and more due to kde.xml in Linux

VirtualBox does not open .vdi file after it is used with kvm

If you installed VirtualBox and later changed your mind to use the .vdi file with kvm, it will work, but when you go back to VirtualBox, it cannot be used. This is because, when it was opened with qemu/kvm, the owner and group became root. To open the file again in VirtualBox, open a terminal … Continue reading VirtualBox does not open .vdi file after it is used with kvm

Fix google-drive-ocamlfuse not able to get token error

The google-drive-ocamlfuse not able to get token error appears when using google-drive-ocamlfuse access to google-drive-ocamlfuse application to Google Drive has been revoked or not granted. If the above error appears, delete the .gdfuse folder and a new token will be generated when google-drive-ocamlfuse application is run again. Open the file manager and remove the folder … Continue reading Fix google-drive-ocamlfuse not able to get token error

Evolution addressbook error on downgrade from Xubuntu 13.10 to 13.04

I upgraded from Xubuntu 13.04 to Xubuntu 13.10. Unfortunately, the Broadcom Wireless Adapter 4313 was not working. Meanwhile, in hope of a solution or a fix to the wireless adapter resolution, I continued to use Evolution. Patience finally ran out. Unfortunately, with not much choice left, I downgraded to Xubuntu 13.04. Before the downgrade, I … Continue reading Evolution addressbook error on downgrade from Xubuntu 13.10 to 13.04

MyApp.MyListListener is not abstract and does not override abstract method actionPerformed(ActionEvent) in ActionListener

Below error means that the spelling of actionPerformed method is incorrect. MyApp.java:100: error: MyApp.MyListListener is not abstract and does not override abstract method actionPerformed(ActionEvent) in ActionListener public class MyListListener implements ActionListener { public void actionPeformed(ActionEvent ev) { See the spelling of actionPerformed. It is incorrect.

Error Exception in thread “AWT-EventQueue-0” java.lang.NullPointerException in Java program

In your Java code, you have the following code segment: public class BigOne { public static int i = 0;     JButton onebutton;     JLabel label;     JFrame frame;    public static void main(String[] args) {       BigOne gui = new BigOne();       gui.go();     } public void go() {     frame = new JFrame(); … Continue reading Error Exception in thread “AWT-EventQueue-0” java.lang.NullPointerException in Java program

avast can not initialize avast! engine: Invalid argument

When running avast, the following error message is displayed at times: avast can not initialize avast! engine: Invalid argument To overcome this error, open a terminal window and enter the following command: $ sudo sysctl -w kernel.shmmax=100000000 <enter> Now you can start avast and it will work. Note that each time you start avast, you … Continue reading avast can not initialize avast! engine: Invalid argument

Overcoming GConf error: Failed to contact configuration server

If you get the following error: Failed to contact configuration server; some possible causes are that you need to enable TCP/IP networking for ORBit, or you have stale NFS locks due to a system crash. See http://projects.gnome.org/gconf/ for information. (Details - 1: Server ping error: IDL:omg.org/CORBA/COMM_FAILURE:1.0) you can try resolving it by doing: $ mv … Continue reading Overcoming GConf error: Failed to contact configuration server