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There was error connecting bluetooth headphones in Ubuntu (xfce) 16.04 : "Connection Failed: blueman.bluez.errors.DBusFailedError: Protocol not available".
One of the solutions is installing bluetooth module for pulseaudio

Today was the first time I could not unpack rar file since I've started to use Linux in everyday use that! The issue was in unrar-free version - it can't unpack RAR files after 3.x version.

File transfer was not working from laptop to smartphone and vice versa. Devices connected to each other without problems.

There is a plugin TransferService in Plugins section. When I've tried to wnable it the message with error was shown:

Sometimes there could be an issue with huge DB which was created not with backup_migrate module but raw mysqldump command. The size of the DB could be over 2GB. Most of the data of this dump are cache tables and logs. Editing this file is not a good choice.

Current solution will remove INSERTS from the file. sed command come in handy here:

Chinese tablets it's not only the cheap price, but in uther cases it's not funny surprises. It was the first time I've met the problem, when the stock firmware has a virus/malware. Couple of them.

MediaTek MT8392 processor, it's the twin of  МТ6582. First is used in tablets, second in phones. I want Cyanogen to run on this device, but didn't found one. I thought that it would be great to repack cyanogen mode myself. Sources are available across the net. But I keep calm, sit down and start to struggle with virus.