random technical notes

Programming Languages – commonly used features in a side-by-side format.

1. From the Windows 8 Start Screen, search for ‘Show or hide common icons on the desktop’

or

1. Alternatively, right-click on the desktop in the bottom-left corner to show the small menu which includes Control Panel. From there, click Appearance and Personalisation, then Personalisation. Finally, click Change desktop icons on the left.
2. Even if the box next to Network is unticked, click it to enable it, then disable it again. (If it’s ticked to start with, untick it).

more

Open a Command Prompt as an Administrator and execute following command:

powershell -ExecutionPolicy Unrestricted Add-AppxPackage -DisableDevelopmentMode -Register $Env:SystemRoot\WinStore\AppxManifest.xml

source

1.Open a command prompt with administrative privileges and execute following command:

powercfg.exe -h off

more info:

• Delete hiberfil.sys by disabling Windows Hibernate function
• How to disable and re-enable hibernation on a computer that is running Windows

To backup Opera you need backup the following folders:

• Folders: sessions, skin, styles, toolbar, webserver
  Win32: Application Data\Opera\Opera
  Win64: C:\Users\<username>\AppData\Roaming\Opera\Opera
• Folders: cache, icons, mail, opcache, temporary_downloads, thumbnails, vps, widgets
  win32: LocalSettings\ApplicationData
  win64: C:\Users\<username>\AppData\Local\Opera\Opera

For more info, see “How do I back up my Opera files?“

• On Ubuntu a script can be written which will use mysqldump + bash + cron + rsync
• The data can be stored on Amazone S3 service ( command-line Amazon S3 client – command-line tool to upload, retrieve and manage data in Amazon S3 service, designed for use in scripts)

The upcoming C++ standard (C++0x) will support multithreading and concurrency both as an inherent part of the memory model, and as part of the C++ Standard Library. “Multithreading and Concurrency” (Anthony Williams):

• Multithreading in C++0x Part 1: Starting Threads
• Multithreading in C++0x Part 2: Starting Threads with Function Objects and Arguments
• Multithreading in C++0x Part 3: Starting Threads with Member Functions and Reference Arguments
• Multithreading in C++0x Part 4: Protecting Shared Data
• Multithreading in C++0x Part 5: Flexible locking with std::unique_lock<>
• Multithreading in C++0x part 6: Lazy initialization and double-checked locking with atomics
• Multithreading in C++0x part 7: Locking multiple mutexes without deadlock
• Multithreading in C++0x part 8: Futures, Promises and Asynchronous Function Calls

Also Herb Sutter is a leading authority on software development. He is the best selling author of several books including Exceptional C++ and C++ Coding Standards, as well as hundreds of technical papers and articles, including “The Free Lunch Is Over” which coined the term “concurrency revolution.”

Effective Concurrency: Prefer Futures to Baked-In “Async APIs”

When you delete a file, Windows removes the index for the file and prevents the operating system from accessing the file’s contents. However, an attacker with direct access to the disk can still recover the file’s contents until it has been overwritten by another file—which might never happen. Similarly, files that have been EFS-encrypted leave behind the unencrypted contents of the file on the disk.

With the SDelete tool, available as a free download, you can overwrite the contents of free space on your disk to prevent deleted or encrypted files from being recovered.

SDelete homepage

Additional information: “Get 7 Free Tools for Managing Disks and File Systems“

Users can share EFS-encrypted files by adding other user certificates to a file. However, auditing the users who have rights to files would be very time-consuming using the Windows Explorer graphical interface. To list users who have access to encrypted files more easily, use EFSDump, which is available as a free download.

EFSDump homepage

• Free Software Magazine (FSM)
• Full circle magazine
• LinuxFormat
• LinuxFormat. Russian Edition
• PCLinuxOS magazine
• Linux Journal
• Linux User and Developer (LinuxUser & Developer)
• Электронный журнал «Open Source»
• Журнал UserAndLINUX
• Linux Magazine (linux-magazine.com)
• Linux Magazine (linux-mag.com)
• Журнал Mint Linux