Author archive: ZERIN

Flutter Programming
Flutter Project: Insecure URL is not working in Android / IOS
April 14, 2021
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I am developing a flutter project called ZTutor. While testing in Android my login was not working, my app was sending data to localhost, which is my local pc. My localhost url was http://192.168.0.105/ztutor/login.php but that url was not receiving any request from the App. So, I changed in the android/app/src/main/AndroidManifest.xml: I have added this […]
Linux CentOS MySQL 5.7
MySQL “Order By Clause” Not Working with “SELECT DISTINCT and ORDER BY” after MySQL Update to 5.7
April 8, 2021
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I have recently updated our MySQL server to MySQL 5.7. Then I have found that in all the projects that has “SELECT  DISTINCT and ORDER BY” SQL statements, are not working anymore. In Order to Fix that I followed the below procedure: Logged in To Server (CentOS 7). In console mode typed # mysqld –help […]
Flutter Network
flutter – android – http.get never works in deployed device / release mode
April 8, 2021
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Recently while working & testing on my own app Zbotics (That assist with Robot Voice when to do what to my family member) which has been made by flutter 2, I have found that App loads data using http.get properly in IOS Simulator & real device but it was not working in Android Device at […]
Uncategorized
My Motivations Video(s)
September 1, 2020
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IOS Programming
firebase: PERMISSION_DENIED: Missing or insufficient permissions
July 28, 2020
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While Developing IOS App that writes / reads from Firebase, I have found that it was not writing any data in Firebase or can not read data from Firebase, when I saw console, I found a error like “[Firebase/Firestore][I-FST000001] WriteStream (7fea67f13818) Stream error: ‘Permission denied: Missing or insufficient permissions.'” So, then I have gone to […]
Commands Linux CentOS php Server WHM
WHM:: PHP Mail is Not Working-Showing Its Disable
June 24, 2020
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When your mail does not work, one example could be as below: Now Update your php.ini from WHM MultiPHP INI Editor, you can see: disable_functions = mail Modify it with disable_functions = Click Save Restart your APACHE from WHM or command prompt.
Commands Linux CentOS
How to Whitelist IP/ finding if IP is Blacklisted in Linux CentOS
June 18, 2020
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1. How to check if an IP is Blacklisted: If you want to blacklist the IP 123.45.67.89 , then run the below command: $ /scripts/cphulkdblacklist 123.45.67.89 You will see a message that the IP has been blacklisted. ####################################################### 2. How to whitelist an IP that is Black Listed If you want to Whitelist the IP […]
Cleaning Commands Linux CentOS
How To Check for Virus / Malware Script in Server / WordPress Site
May 25, 2020
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Check Recently Modified Files in Server Login to server through SSH, run the below commands to find out which scripts have been uploaded recently $ cd /home/public_html/$ find ./ -type f -mtime -15 (this code checks all files that has been uploaded / modified in last 15 days) $ find /etc -type f -printf ‘%TY-%Tm-%Td […]
Uncategorized
MacOSX: Mojave Saas Install Error Fix
March 30, 2020
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Building native extensions.  This could take a while… ERROR:  Error installing sass: ERROR: Failed to build gem native extension.     current directory: /Library/Ruby/Gems/2.3.0/gems/ffi-1.12.2/ext/ffi_c /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/bin/ruby -r ./siteconf20200329-26235-12xn9hq.rb extconf.rb mkmf.rb can’t find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/include/ruby.h extconf failed, exit code 1 Gem files will remain installed in /Library/Ruby/Gems/2.3.0/gems/ffi-1.12.2 for inspection. Results logged to /Library/Ruby/Gems/2.3.0/extensions/universal-darwin-18/2.3.0/ffi-1.12.2/gem_make.out
Photography Rule of Space Uncategorized Visual Composition
Composition: Rule of Thirds
March 24, 2020
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Composition = Emphasis = The Key to take Strong Images Description: In photography, the rule of thirds is a type of composition in which an image is divided evenly into thirds, both horizontally and vertically, and the subject of the image is placed at the intersection of those dividing lines, or along one of the […]

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