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Encrypt files with openSSL

$ openssl aes-256-cbc -a -salt -in photo.jpg -out fimily-photo.enc
enter password: ********

Decrypt file with openSSL

$ openssl aes-256-cbc -d -a -in family-photo.enc -out photo.jpg

FoxNeo

Javadoc comments

class header

/**
* Describe the class here.
*
* {@link some.other.class.Documentation} for linking to other docs or symbols
* {@link some.other.class.Documentation 
* {@code code goes here} for formatting as code

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codepen.io

• HTML
• JS
• CSS

https://codepen.io/

FoxNeo

Tomcat TLS with pem cetificates config

1. edit server.xml
2. add the cert files to conf/ folder
3. add the following code to server.xml

<Connector port="443" SSLEnabled="true" secure="true" scheme="https">
  <SSLHostConfig>
    <Certificate certificateFile="conf/cert.pem"
 certificateKeyFile="conf/cert-key.pem" /&gt;

FoxNeo

DBeaver universal Database Tool

OpenSource 😃 and multiplatform Linux, Mac and Windows

• https://dbeaver.io/

FoxNeo

This command shows all your open ports:

sudo ss -tupln

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Random MAC address Linux

If you are connected to a public Wifi and you want to change your MAC address to bypass 30 Minutes free sessions or for privacy, you can easily generate a random mac address every time.

Enable random MAC Address

sudo vi /etc/NetworkManager/conf.d/macchange.conf

Inside write the following lines:

#[device]

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Linux

CTRL + Shift + i

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Install Firefox Developer Edition on Linux

Download the bin from the official page: https://www.mozilla.org/de/firefox/developer/

sudo cp -rf firefox-86.0b9.tar.bz2 /opt
sudo tar xjf firefox-86.0b9.tar.bz2
sudo chown -R $USER /opt/firefox
nano ~/.bashrc 
 -> export PATH=/opt/firefox/firefox:$PATH

FoxNeo

scp

SSH authentication is required!

How it works?

source: https://linuxize.com/post/how-to-use-scp-command-to-securely-transfer-files/

scp [OPTION] [user@]SRC_HOST:]file1 [user@]DEST_HOST:]file2