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 […]
Category: Howto
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.
Freifunk: Setup Router Software Bugfix
If you want to share Public Wifi at home for friends and you don’t want to share the Wifi Password, you can setup cheap a Public Openwrt Wifi Router as Access Point. Advantages: Public Setup needs no Wifi Password You are not responsible, cause the Internet is pulled thru a VPN of Freifunk Network It’s anonymous! It’s free of Charge! Supported by a big Community Can installed on very cheap old Routers like the TP-Link 841 (find the Singleband Router on Amaz or EbXX 12$ or Powerfull Dualband Router TP Link C7 at 50$) Can by used at EVERY Freifunk […]
WordPress: Get URL of all Posts
On a lot of Blogs, Forum and Howto Pages i have read the Question: “How to get the URL of all WordPress Posts?” If you dont want to use a external Plugin which can be a Security Hole in the CMS you can fix it with a small Workaround: Login into WordPress as Blog Admin Create a New cenral Categorie like “Howtos” Now go to the Posts Page where all Content Pages can be seen as list Here SELECT ALL and do Bulk Action “ADD” to the new Categorie “howto” that’s it.. now all Posts listet like.. https://www.linuxonlinehelp.eu/category/howto/ Remark: If […]
Linux: Bash Script Time Saver Session Timer
If you use daily the Internet you know how fast the Time passes. The Internet Research can grab a lot of time without that you feel it. Thats wasted time! For saving Time on Linux you display a Timer Message on the User Screen after some Time, which let you remark that XX Minutes are gone. The Linux Tool who can offer this is called “gxmessage” Howto: Install gxmessage if not installed with $sudo apt-get install gxmessage open the root Crontab with $crontab -e Enter this code (Username = User!): */10 * * * * sudo -u username DISPLAY=:0.0 […]
Affiliate: With Promotion Advertisement NO Money
If your are a Blogger like me, you perhaps want to earn money with Advertisements. On this point you should know that many things prevent you from being successful. A lot of Internet Blogs and Clever Pages tell you the “FAIRY TALE” of getting much “EASY MONEY” but this is not true. Why, see here: First Search Engines like Google prefer Blogs with “https” on Ranking, if you “iframe” Affiliate Banners you lost the “closed” lock, cause iframed Links are “NOT YOUR CONTENT”. Most of today’s OS uses modern Webbrowsers like Firefox with Ad Blockers, Javascript Blockers, Java Blockers, or “Privoxy Ads […]
Android: Reset Phone Data Manager Huawei App
If you use a Huawei Smartphone, you can set the Data Transfer Limit at the Phone Manager App which disconnect the mobile data transfer if the Limit is reached. But if you want to disable it there is NO RESET OPTION! This can run you into trouble cause the App disable the Mobile Data Modem (LTE) for data transfer daily by Automatic! To Reset it go: go Android Settings > App Manager go Phone Manager App (Telefonmanager App) and press delete Data Button right press Stop the App now now the Settings from last Travel are gone!
Android: Disable Screensaver Ads Fire Tablet
If you use a Fire Tablet and you want prevent kids from ads do: Enable the Developer Options by Settings > Device Options > Tap on Serial Number several times > You are now Developer Enable the USB Debugging on Setttings > Device Options > Developer Options > Enable ADB > Tap on toggle > Enable Connect the Tablet to a Linux PC with installed “android-tools-adb” on Win use Adb-Tools-Package from Google Open a Terminal enter Fire OS 5.0.x: adb shell pm hide com.amazon.kindle.kso exit adb reboot Fire OS 5.1.x+ adb shell pm clear com.amazon.kindle.kso pm hide com.amazon.kindle.kso exit adb reboot […]
MYSQL: Default Basic Table Structure WordPress
If you use WordPress and have tested some plugins and removed them later, it is possible that you have much waste tables still inside your database. First do Database Backup with MySQL DUMP Then check it enter the mysql console as your mysql admin user and do: $mysql -u mysqladminusername -p mysql > use databasename; mysql > show tables; System echo: +—————————+ | Tables_in_wordpressdatab | +—————————+ | wp_commentmeta | | wp_comments | | wp_links | | wp_options | | wp_postmeta | | wp_posts | | wp_term_relationships | | wp_term_taxonomy | | wp_termmeta | | wp_terms | | wp_usermeta | | […]
Apache: Count Visits on Console
If you use a Webserver like Apache, you can use a small script to Analyse your Logs. Create a analyse-web.sh Script with: $sudo nano /home/user/analyse-web.sh insert: #!/bin/bash cat /var/log/apache2/access.log | awk '{ print $1 }' | sort | uniq -c exit 0 System Output: 1573 www.domain2.de 3568 www.domain3.de .. If you change the “$1” to other value like “$8” you will get the count of touched files or folders! This shows you attacks on single Files by abnormal high counts! You can use cron to run it every 15Minutes and send it to mailbox of a user. And this way […]
Apache: Analyse Logs Spam Bots
If you admin a Apache Webserver, you see often weekly thousand of visits a day on your Blogs. Background: These are no real users, this visits are made by Spam Bots in my Logs like Xovi.de or xovibot.net Bots! On info pages this Company says Admins should disallow crawl by robots.txt, but they IGNORE the settings! This x-guys is in my opinion against German Law “Datenschutz”. "Mozilla/5.0 (compatible; XoviBot/2.0; +http://www.xovibot.net/)" Solution: On Linux Setup a Firewall like ufw and block these IP Ranges To find out the IPs do: $sudo cat /var/log/apache2/access.log|grep xovibot.net| awk '{ print $2 }' | sort | […]
Rsync: Performance NFS Boost
If you use two Linux Servers with NFS Shares connect over Gigabit Interfaces for Backups, you perhaps remark performance problems on using rsync. It does often pause transmissions or reach only a rate of 32Mb/s. That’s bad and waste time and energy. Background: After some Tests of running Backups with single files and compressed big archives, the scans of my tools like iftop, systat, iptraf found out that the used Option “rsync -avz” was the bottle neck, cause the Data Rate break down at intervals. The “z” compress option was described on howtos as must have for slower networks did […]
Ubuntu: Deja-Dup Backup Freeze Desktop
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.
WordPress: Prevent Copyright Violation
If you are a Hobby Blogger like me, you should ALWAYS take Snapshots for your Blog with your OWN Camera! For “non professional” use you can take the cheapest Camera or reuse old Smartphones of the Family. Resolution at VGA Mode (640×480/800×600 less 250kb) is more enough than you need. Faster you can’t save or earn Money, a Camera Snapshot needs less a second.. Don’t DO Rules: Don’t download and share Images from public sites Don’t take Snapshots on public Sites with a Snapshot Tool like gnome-screenshot Don’t take Parts of Images from public sites Don’t trust free Image Pools!! Most […]
WordPress: Change Word on all content sites with mysql
If you run a WordPress Blog or other CMS with MySQL Backend you can easy change one same word or expression on all content sites on the fly Do a mysqldump at first of the current database $ mysqldump -u username -p dbname > dbbackup.sql Login to the MySQL server Console Switch to the Database mysql> use dbname; run command for tests, lists touched posts mysql> SELECT * FROM wp_posts WHERE (post_content LIKE '%expression%'); Run Replace code to pre, cause i use preformat text plugin for the copy & paste boxes mysql> UPDATE wp_posts SET post_content = REPLACE ( post_content, […]