On Debian Sid i have seen that ufw service is stopped on logrotate!! Its a bad known bug! Workaround: Set all Services like Dovecot, Postfix to listen on LOCALHOST (127.0.0.1) if not needed over Internet Enable ONLY encrypted AUTH (Login) to Postfix! (TLS 1.2) Disable unneeded Services ! like Samba, FTP… move config from /etc/logrotate.d/ufw to /root/ to disable ufw logrotate !! edit /etc/ufw/ufw.conf set LOGLEVEL to “off” restart the Server and check open Ports next Days from outside with: $sudo nmap -PN my.server.com
If you upgrade or install Ubuntu to 18.04 the last and current LTS Version you have may asked yourself “what the hell is snap loop device?” Easy Snap was hidden built in to print MONEY, sure?? YES see manpage snap.. ” BUY A SNAP !!” .. its a new try to get money since Amazon Shop Link implementation.. like others from Appstores.. Howto get rid off? Removing of snapd with purge app Apps by deps.. # sudo apt-get remove snapd –purge Some may ask do i need snaps? No cause most packages still live at the debian apt repository Snap […]
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. Howto fix: 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 install with: sudo apt-get install surf and use surf https://mobile.twitter.com/yourprofilename 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 […]
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! Solution: 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). Howto: Burn the ISO to DVD/CD (NON-Linux-PC) Boot your […]
If you boot your PC on a Setup CD into “live” mode after some time the Desktop Unity or Gnome starts. After successful testing the PC with the current Drivers and Kernel you can select “Install” by pressing the icon left on the desktop. But here the Problem appear that you dont see any informations about bugs, crashes, or other major messages during the setup. Without this you are not able to find any errors later, or you cant tell a supporter what happend! Workaround (#comments!): Always open a gnome-terminal as first step instead of pressing the installer icon! move the gnome-terminal […]
If you want to update the SSD Firmware of a device you should know some things: Do you REALLY need the update? Bugs? If NOT exit here! Firmwareupdates can destroy DATA on Drives! Data cant be restored if the Controller fails after Update Downgrade a Firmware to older is most IMPOSSIBLE!! .. now you need a USB Stick 4GB and the ISO File of the Firmware Disk of the Manufacter then open the Gnome Terminal or Console and: $sudo su – #become root $apt-get update && apt-get install unetbootin gparted # install the tools $dd if=/dev/null of=/dev/sdc bs=10240 count=1 # […]