To compact a folder in Outlook

 To compact a folder in Outlook, go to File > Account Settings > Account Settings, then on the Data Files tab, select the desired data file, click Settings, and finally select Compact Now to compress the selected Outlook data file (PST) and free up space

dpkg commands...

 To install a package using the dpkg command in Linux, you can use the following command: 

Install a package: sudo dpkg -i <package.deb>

Here are some other things you can do with the dpkg command:

List known packages: Use the -l tag: dpkg -l 

Remove a package: Use the -r tag: dpkg -r <package> 

Purge a package: Use the -P option: sudo dpkg -P <package> 

Unpack a package: Use sudo dpkg --unpack <package.deb> 

Configure a package: Use dpkg --configure <package> 

Check if a package is installed: Use the -s tag: dpkg -s <package> 

Show package information: Use dpkg -I <package.deb> 

List all available dpkg commands: Use the -help option: dpkg –help 

Wallpaper change in windows 10

You can set the wallpaper using the Local Group Policy Editor (gpedit.msc), at User Configuration > Administrative Templates > Desktop > Desktop, group policy "Desktop Wallpaper". Set the policy to Enabled, enter the file path and click OK.

In the registry, this is set at key HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System (you may need to create missing sub-keys). Create two REG_SZ items, one named Wallpaper for the path to the image file, and the other WallpaperStyle whose value is 4.