Windows 10 guest slow on VirtualBox

Windows 10 guest slow on VirtualBox

For improving Windows 10 performance in VirtualBox, shutdown Windows 10, go to settings of your Windows 10 VirtualBox definition and change default hypervisor.


VM Settings > System > Acceleration tab, Paravirtualization, select Hyper-V (previously set to Default)



It might help using USB 3.0 in configuration instead of USB 2.0.


Solution was found here

Kate upgrade 4.14 to 5.0 session recover

Sessions in KDE 5 Kate are located in different folder jut copy sessions over to new folder and they will work out of the box.


cp ~/.kde4/share/apps/kate/sessions ~/.local/share/kate/sessions

Google Chrome backup or restore Seesion or Tabs

On Linux go to home directory and copy these two files

~/.config/google-chrome/Default

"Last Session"

"Last Tabs"

Can't switch keyboard in google-chrome or chromium from version 35+ --> Fixed in /etc/locale.conf

Keyboard layout switcher doesn't work if browser is started in en_US locale!
Because of that you need to start google-chrome or chromium with whatever non-English locale you use for example LANG=sl_SI.UTF-8 for Slovenian locale.

Running google-chrome like this fixes the problem.

`LANG=sl_SI.UTF-8 /usr/bin/google-chrome-stable`

You can create KDE Desktop shortcut Chrome.desktop

[Desktop Entry]
Comment[en_US]=
Comment=
Exec=LANG=sl_SI.UTF-8 /usr/bin/google-chrome-stable
GenericName[en_US]=
GenericName=
Icon=google-chrome
MimeType=
Name[en_US]=Google-Chrome
Name=Google-Chrome
Path=
StartupNotify=true
Terminal=false
TerminalOptions=
Type=Application
X-DBUS-ServiceName=
X-DBUS-StartupType=
X-KDE-SubstituteUID=false
X-KDE-Username=

Update 31.08.2014

A general system wide fix for all users is to update locale.conf with more advanced options:

Create or edit /etc/locale.conf with these options:

# Enable UTF-8 with US settings.
LANG="en_US.UTF-8"

# Keep the default sort order (e.g. files starting with a '.'
# should appear at the start of a directory listing.)
LC_COLLATE="C"

# Set the short date to YYYY-MM-DD (test with "date +%c")
LC_TIME="sl_SI.UTF-8"

KDE Upgrade 4.13 came up with baloo indexer and there is no button to turn it off.

KDE Upgrade 4.13 came up with baloo indexer and there is no button to turn it off.

So here are some ideas

I decided for First method

1. Legal way to block searcher
Go to KDE System Settings > Desktop Search > click plus sign and add your home to excluded folders.

You need to log out or reboot or run the script below  to stop the current indexer!

2. More intrusive version create kill script to run at KDE start-up
vi BalooStop.sh 

#!/bin/bash
killall -9 baloo_file_cleaner
killall -9 baloo_file
killall -9 baloo_file_extr
#rm -rf ~/.local/share/baloo/*

chmod +x BalooStop.sh 
./BalooStop.sh 

3. More hakish way create symlinks to /bin/true

mv /usr/bin/baloo_file_extractor /usr/bin/baloo_file_extractor.orig; ln -s /bin/true /usr/bin/baloo_file_extractor

mv /usr/bin/baloo_file_cleaner /usr/bin/baloo_file_cleaner.orig; ln -s /bin/true /usr/bin/baloo_file_cleaner

The heartbleed bug was introduced in OpenSSL 1.0.1 and is present in

1.0.1
1.0.1a
1.0.1b
1.0.1c
1.0.1d
1.0.1e
1.0.1f

The bug is NOT PRESENT in 1.0.1g, 1.0.0 and 0.9.8 branch of OpenSSL.

Check Arch Linux 

pacman -Q openssl
local/openssl 1.0.1.f-1    

If you see any version above you need to patch Arclinux

pacman -Sy ; pacman -S openssl ;

Check rpm based systems Centos/RedHat/Oracle Linux

rpm -qa |grep openssl
openssl-1.0.0

If you see any version above you need to patch OS

yum update openssl

Apache upgrade 2.2 to 2.4

Apache is running a threaded MPM, but your PHP Module is not compiled to be threadsafe.  You need to recompile PHP.

In your httpd.conf find the line that loads the event MPM:

LoadModule mpm_event_module modules/mod_mpm_event.so

Replace it with one that loads the prefork MPM:

LoadModule mpm_prefork_module modules/mod_mpm_prefork.so

Of course you still need to load the PHP5 module (libphp5.so) and the corresponding config file somewhere.