Apparmor has a current bug with the Kernel 4.14 on Debian and seems Ubuntu too, it blocks MySQL and other services from clean run. Bug touches Network Stack of the Kernel
I have often seen that the Unity Topbar of Ubuntu LTS is hidden or not clean loaded after Login.
It’s Caching Problem of Unity (Compiz) and Lightdm, if the PC is not clean rebooted or started.
sudo rm -fr ~/.cache/compizconfig-1 \ && sudo rm -fr ~/.compiz && sudo service lightdm restart
Now relogin and check.. if ok do a Profile Backup! with:
tar -cvzf /usb-backup-stick/compiz.tgz \ /home/username/.cache/compizconfig-1 /home/username/.compiz
If you search for a slim twitter client on desktops try the small “surf” browser
sudo apt-get install surf
Now you have a slim and clean Twitter Timeline like on Tablets, it can be resized to Banner or Fullscreen.
If you work on older Laptops and you use a Console only System Setup like on Debian there is a Bug on systemd and the console-setup package since years. After reboot all Font Settings seems gone. But the Settings are not real gone, cause systemd does not pull the settings on boot!
How to fix?
- edit the crontab of root by
sudo su - crontab -e
- insert the /bin/setupcon command on “@reboot” means on every boot!
@reboot /bin/setupcon > /dev/null 2>&1
- save and exit, reboot now
- now the PC should echo big Fonts for old eyes “Terminus 20×12 Frambuffermode”
If you use Ubuntu on your Systems, you perhaps read last weeks about a new Release Version.
I am often asked, must i upgrade now?
My answere at first is not really, cause the new Versions are not cleaned up by all bugs and the User or Admin must recheck against the new advantages of the new Releases for production usage. I prefer to wait 3 Month after a Release by Ubuntu is published. But if you setup a very new Hardware your are often forced to take the LAST Release Version, cause it supports newest Hardware Chips by the latest Kernel (for example Laptop mixed Chips Wifi/Bluetooth/USB3.0).
Remark: You should read the “release notes” of the Versions, cause this can prevent you from running into trouble or “black screens”. DONT forget to Backup the old OS if you try to start the Upgrade. Fresh Setup’s are often smaller and more free of Bugs as “upgraded Systems”! Cause sometimes the old Configs are not all updated or replaced! (User-Homes). New Releases can allocate MORE Disk Space and offer new Call Home Sniffing Tools, RECHECK open Ports, running Processes and Privacy Settings!
On Companies you must always setup a “Lab PC” for Testing the new Releases before rolling out the OS.
Print this Release Timeline out to be updated daily..
If you use Ubuntu Desktop 16.10 you will run sometimes into freezes of the Desktop with a Default Setup.
Background: Theres a known Bug of the Deja-Dup Backup Service which is started by Cron. The Service take 100% Ram and 100% CPU usage. This did my PC with 16GB Ram too! Only HARD RESET helps to get back Control!
- Purge the deja-dup service with:
$sudo apt purge deja-dup
- Use instead the “rsync” tool by command line with users crontab to Backup your User Homes to external or 2nd. Disk.
This should fix the problem.
Bug: Minimize Windows freeze Unity Desktop 15.04
Solution: If you use Tweaks to disable or hide the Desktop Icons which are displayed by Nautilus Filemanager Unity is often freezing on maximize or minimize the Windows of Apps like Firefox or Chromium-Browser. This is NO Compiz or Graphic Chip Driver Problem! Its seen on Intel HD, Radeon or Nvidia Graphic on “fresh” Systems!
No Log Entry’s are made!! by the System, User must often hard reset the PC or restart Lightdm Login Manager on Console!!
For all Users, especially Newbies its VERY helpful to have a Rescue System on a USB Stick if a Major Update/Release Change fails or break the System. To this the Ubuntu-ON-RAM Live System is very useful at public shared PCs for Online Banking etc., cause after every reboot all old Firefox Data are safe deleted!!
How to create this VERY helpful Tool Stick for free?
All you need is the latest Ubuntu-ISO file (AMD64-15.04 – 64bit) a new 4/8GB USB Stick (take a good Brand! to get a high quality tool).
- Burn the ISO to DVD/CD (NON-Linux-PC)
- Boot your PC on this DVD/CD
- Plugin the USB Stick
- Open a Gnome-Terminal
- Change to root/admin User enter $ sudo -s
- To cleanup the NEW Stick enter $ dd if=/dev/zero of=/dev/sdb bs=1M count=10
- Create new Partition Type Primary set to Format “FAT32” with Partition Tool “Gparted” do $ gparted /dev/sdb
- Exit gparted
- Re-Plugin the Stick
- On the Gnome-Terminal enter to umount the auto mounted Stick by Filemanager “Nautilus” $ umount /dev/sdb1
- Open Firefox download latest Ubuntu-ISO to this Live System (Downloads)
- Run now the Start-Disk-Creator and create the Emergency Stick with “SELECTED NON PERMANENT FILESYSTEM”!!! (last Option) select the Stick and the ISO-File
- After this Process ends, exit and reboot the PC on the USB stick for TESTING!
- Language for the KEYBOARD can be set on “EN” beside the CLOCK, touch with right Mouse Button to view the menu, select last point to add you Language!
- Very secure USB System for Internet Access and Emergency Help to recover or Backup YOUR DATA!
- Live Linux-On-RAM System with Firefox on Live Mode WITHOUT saving History or Trash!!
- If used on a Travel Laptop a very secure System for Traveling cause you can REMOVE the Harddrive!!
- With this always working OS you can test your Hardware, fix Errors, find out why the installed System freezes, do full backups (mirroring to usb disk)