About jontas

I like to make things that people find useful.

Netscape Navigator 9.0: Don’t show the session restore popup

Netscape Navigator 9.0 will promt the user to restore the previous session (pages that were open) if the browser crashed (or was shut down hard/incorrectly).

This can be turned off by going into “about:config” finding the key “browser.sessionstore.resume_from_crash” and setting this to false.

Update: This also applies for the SeaMonkey Browser

Windows: Don’t update Google Chrome (i.e. disable auto update)

By default Google Chrome will update to the latest version automatically. It is however possible to disable this and instead update manually (when needed/wanted).

Note: This means you will not get security updates as threats are found and these get fixed – so this might be a bad idea to do if you don’t plan to update manually.

Open up a registry editor and check if the key “HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Update” exists, otherwise create it (the key is the tree structure in regedit).
Now enter a Key name “DisableAutoUpdateChecksCheckboxValue ” as a DWORD and give it the value “1”.
This will keep Google Chrome from auto updating.

Setting up JAVA_HOME on Window

The JAVA_HOME variable should point to the JDK’s bin folder in order for Java applications (jar, war, etc) to know where Java lives.

To setup a JAVA_HOME environment variable on Windows.

  • Right click on the My Computer icon in the start menu or on the desktop and select properties
  • Click the Advanced Tab
  • Click the Environment Variables button
  • Under System Variable, click New
  • Enter the variable name as JAVA_HOME
  • Enter the variable value as the install path for the Development Kit
  • Click OK
  • Click Apply Changes

Word of caution, Java is not fond of spaces, so I use pathnames without spaces.

Note: You will need to click OK, apply changes AND reload cmd to see the changes there.

VBoxManage controlvm reset & poweroff

When you are running for instance a headless host machine it is sometimes needed to turn it off or to restart it from outside the host (for instance as part of a script or if the host is not accessible, no rdp etc).

Word of caution: These operations stops the machine dead in its tracks, any unsaved data is lost!

To turn it off (equivalent of pulling the power cable):

VBoxManage controlvm <vm> poweroff

Note: can be either the registred machine name or the UID of the host

To restart it (equivalent of pushing the reset button):

VBoxManage controlvm <vm> restart

Note: can be either the registred machine name or the UID of the host

For more details, here is what the manual (4.1.2) says:

  • VBoxManage controlvm reset has the same effect on a virtual machine as pressing the “Reset” button on a real computer: a cold reboot of the virtual machine, which will restart and boot the guest operating system again immediately. The state of the VM is not saved beforehand, and data may be lost. (This is equivalent to selecting the “Reset” item in the “Machine” menu of the GUI.)
  • VBoxManage controlvm poweroff has the same effect on a virtual machine as pulling the power cable on a real computer. Again, the state of the VM is not saved beforehand, and data may be lost. (This is equivalent to selecting the “Close” item in the “Machine” menu of the GUI or pressing the window’s close button, and then selecting “Power off the machine” in the dialog.)
    After this, the VM’s state will be “Powered off”. From there, it can be started again; see chapter 8.11, VBoxManage startvm
  • FireFox 2.x don’t show the session restore window

    When FireFox 2.x came out it was the first version that introduced session restore if the browser crashed (or was shut down hard/incorrectly).

    This can be turned off by going into “about:config” finding the key “browser.sessionstore.resume_session” and setting this to false

    Also you probably want to check out the startup options under “Tools->Options->When Firefox starts

    (This can also be used to show the session restore window by setting the “browser.sessionstore.resume_session” to true)

    Note: This can also be used with Flock versions 2.6.x as that is based on FireFox

    PHP raw POST data

    To read the raw data being posted to a php page (for instance when $_POST is empty due to problems with encoding types or $HTTP_RAW_POST_DATA not being readable due to php.ini settings) reading file_get_contents is a nice solution.

    $postData = file_get_contents('php://input');