If you use a Router with IP Phones you perhaps want to have a Power Storage for up to 60 Minutes to use IP Phone or WIFI on Power Failures?? Major Info: Check the Router DATASHEETS! the Battery Voltage on loading should never go over maximum!! Some Trafo wind up to 14Volts and more! This DESTROYS the DSL MODEM CHIP !!!! The 10 Cell AA Batterholder allow to connect 9 Cells! Connect the Wire to only 9th Connector 9x AA 1,26V let the Router work The Modem is protected cause the Circut runs under 12 Volts! 11,25 – 11,5V, the […]
Security: Disable USB Drive mount for Users
If you share your Systems and you want to disable USB Drive connects there is a small solution. By default the gvfs Service handle all automounts and drive scans. On old Linux Systems you could purge the complete gvfsd “Backend” but Ubuntu-Desktop forces some pakets to the default Desktop Package! If you purge it the working Desktop can be destroyed! It’s easier to disable the “USB Drivers” called Modules from load on Start! Cause Rules are “Software” and can FAIL unknown!! Howto? Edit the /etc/modprobe.d/blacklist.conf and add: blacklist usb_storage blacklist uas Update initramfs (Kernel Image) update-initramfs -u -k all reboot […]
Fire TV Stick: Export Audio to external Speakers
If you use a Amazon Fire TV Stick you perhaps want to replace TV Speakers with a Audio System. To get a 3,5mm Audio Stereo Signal you can take a Ligawo HDMI to DVI Box. It splits the 2.1 Stereo Audio Signal from digital to 2.1 Analog Signal. You can plugin: Headphones use at Office Active Speaker Audio Systems 2.1 Recorder (for Music Records of Live Concerts) Laptop to record with free Suite called Audacity free Download for Win+Linux
Security: Isolated Browser eMail Programs
If you want to be more secure, on Linux you can isolate used programs on different Users! All you need is installed by default! Howto: Add a new User for eMail and Browser to the System with: $sudo adduser mailuser $sudo adduser webuser now install if not installed by default “gksu” User Switch $sudo apt-get install gksu copy now the default App Links to webuser’s Home Desktop, for mailuser enter mailuser’s name $cp /usr/share/applications/firefox-esr.desktop /home/webuser/Desktop/firefox-esr.desktop edit the firefox-esr.desktop by right click on nautilus or a editor and change command line: old: /usr/lib/firefox-esr/firefox-esr %u to: gksu -u webuser -w "/usr/lib/firefox-esr/firefox-esr %u" […]
Security: Protection Against Cryptware Wannacry
You heard perhaps last day’s about the major problems of Attacks to Systems with the “WannaCry” Crypto Ware Howto protect yourself? Enable the Firewall on Windows Systems!! Always! Update daily the Virus Scanners and Windows Patches! Disable and CLOSE Ports you never need! SMB Protocol is a open unencrypted Transfer Protocol! Use a second Router with Firewall behind your ISP Router or Modem! (openwrt, pfsense) Check with nmap Portscanner Tool the taken Rules and check if the work! For Network Access use ALWAYS SFTP with Authentification over KEYs Logins (Two Factor: Key and Password for unlock the Keyfiles id_rsa) For […]
MediaWiki: Purge All Users hold Page Content
If you use MediaWiki to hold your Infos, you perhaps want to Mirror the wiki to other Locations or drop all Users but hold the Content? You can do it with onboard tools: On the Source: Login into the Console of the Webserver go to /webspace/wiki/maintenance run here: php dumpBackup.php –full > backup.xml tar or rsync the image folder to destination Webspace copy backup.xml to the destination Webspace if you not have done, install MediaWiki new on the destination go to the /webspace/wikinew/maintenance paste backup.xml here restore the backup: php importDump.php backup.xml run rebuild Database: php rebuildrecentchanges.php cleanup Caches: php […]
Chrome Browser: Disable Password Passphrase Autologin Seahorse
Today i got a call and was asked how to STOP Seahorse from asking with a Passphrase Popup after opening Chrome or Chromium Browser: Seems that google implementated a new Tool for Security to Prevent Access to STORED Browser Passwords, BUT this won’t work on Desktops with USER AUTOLOGIN like Lightdm! Howto: open a Terminal an enter ln -s /usr/share/applications/google-chrome.desktop /home/username/Desktop/google-chrome.desktop Now open the new Icon on the desktop with the mouse right click Change Command Line for Chrome : google-chrome-stable –password-store=basic %U or for (chromium): Now open the Browser with the new Icon Link On Ubuntu you can hold the Icon […]
Google: Chrome Browser RSS Reader
If you use a Chrome or Chromium Browser, the google RSS Extension can help you to stay “up to date” Howto install: Open the Browser and enter: chrome://extensions select “get more extensions” now on the App Store filter “by google” left and search rss google install it then you will find the installed tool on now go to a Website like https://www.linuxonlinehelp.eu/feed/ grab the RSS feed by touch on the right shown Icon SAVE NOW the current URL “chrome-extension://…” without to subscribe to the Browser local URL Toolbar! (Offline, needs no Account!) The Reader Plugin convert the RSS XML to HTML! […]
Linux Console: SSH Echo Last User LOGIN Info
If you use SSH Logins to your Systems, you perhaps want to know, who logged in last days and from which IP Address. Screenshot SSH Login Echo LAST Info: Howto: Open the .profile File at your Home with a Editor and enter: clear last -n 4 This will echo after login the last 4 Logins including the used IP’s To prevent Hackers to purge the lines set the .profile File “readonly” sudo chmod 444 .profile sudo chown root:root .profile
WordPress: Useful Keyboard Shortcuts Editor
If you use WordPress you can speed up your blogging by using the WordPress Shortcuts: Visual Editor: Basics: Ctrl + b = Bold Ctrl + i = Italic Ctrl + c = Copy Ctrl + v = Paste Ctrl + x = Cut Ctrl + a = Select All Ctrl + z = Undo Ctrl + y = Redo Ctrl + [number] = Insert heading sizes, e.g. CTRL+1 = <h1>, CTRL+2 = <h2> Advanced: Alt + Shift + n = Check Spelling Alt + Shift + l = Align Left Alt + Shift + j = Justify Text Alt + […]
WordPress: Enable Distraction Write Mode Editor
If you use WordPress, you perhaps switched off some features long time ago, once i missed was the Editor Fullscreen Mode where the Posting Paper only was shown. To enable it again: Login as User with Editor Rights Enter on Browser Fullscreen (Firefox = F11) Open with the Mouse the “Screen Options” Menu on the top right There you find the switch to select on. Now a “Cross Button” appear on the tools bar See on the right site the “Cross Distraction Button”, click to cleanup the Editor. The WordPress Borders are hidden.
Android: Upgrade Downgrade Kindle Fire Firmware Bug
If you use a Amazon Kindle Fire 2015 (45$) Generation “Ford” or other Android Tablets,Smartphones you must know some MAJOR Informations about the Firmware Handling. If you were asked by the Fire OS or Android to “Upgrade” the Firmware OS, DON’T PUSH YES it without READING DETAILS! I prefer ALWAYS NO FIRST! Use ALWAYS a SDCARD to hold the MAJOR Data of your Tablet, cause if bricked or damaged you can’t pull off the DATA!!! Android Firmware Images INCLUDE not only the OS, it includes DRIVERS, and the MAJOR BOOTLOADER!! Cause Android Devices use no real BIOS!! If you Upgrade, you […]
PDF/A: Setup Linux CUPS to Print Archive PDF/A
If you have a Office and you have to archive Documents and Prints over Years you should have heard that there is a special PDF Type called PDF/A which is set as default Archiving PDF File Type for decades. To use it you can use the Linux Print Server called CUPS to translate all digital Prints to PDF/A. This free Software Printer is known on all Linux Releases, and he can listen on USB and Network Interfaces on Documents. Also you can use Network Printers/Scanners like the Brother MFC-Series to Scan Documents and later to print them virtual as PDF/A […]
Freifunk: Openwrt Router Setup Mesh Wifi Meshing
Many of Users have asked me what are the Advantages of using Freifunk WIFI Routers at Home? One of my answer’s is that the Freifunk OS Openwrt SUPPORT the “MESH” Technology! This is mostly offered by high end WIFI Accesspoint’s or Industrial Devices. Mesh is a Communication Protocol where minimum 2 Devices handle WIFI Access Connections to a WIFI Endpoint (Client, like a Tablet) There are 3 supported “Mesh” Types: Mesh connects between LAN Ports Mesh connects between WAN Ports Mesh connects between WIFI (default) Here you see a Mesh Map of a Mesh Network (Public Admin Webpage Meshviewer): Advantage […]
Android Browser: GNU IceCat the better Android Browser for you?
If you use Android on your Tablet or Phone, and you like to get back more privacy and security you should take a closer look at the GNU IceCat Android Browser: Source: https://ftp.gnu.org/gnu/icecat/38.6.0/ (Outside of Play Store) IceCat need NO Google Account and does not call home, install it and try it. I don’t wanne miss IceCat on my Cellphones Handling is same like Firefox, cause it’s based on Firefox Framework, but offers more user access.