MacOS® 10.10.4 and above
To clear your DNS cache if you use MacOS X version 10.10.4 or above, perform the following steps:
Click Applications.
Click Utilities.
Click Terminal.
Run the following command:
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sudo killall -HUP mDNSResponder |
Or on Microsoft Windows version 7, 8, 10 type the following command to the command prompt:
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ipconfig /flushdns |
You can install ssh-askpass using Homebrew, this method also works on the latest Mojave 10.14.5 version.
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$ brew tap theseal/ssh-askpass $ brew install ssh-askpass |
Here is a quick solution written in php that you can use to determine the current IP address of a given webhost/domain.
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<?php echo GetClientIP(true); function GetClientIP($validate = False) { $ipkeys = array( 'REMOTE_ADDR', 'HTTP_CLIENT_IP', 'HTTP_X_FORWARDED_FOR', 'HTTP_X_FORWARDED', 'HTTP_FORWARDED_FOR', 'HTTP_FORWARDED', 'HTTP_X_CLUSTER_CLIENT_IP' ); $ip = array(); foreach ($ipkeys as $keyword) { if (isset($_SERVER[$keyword])) { if ($validate) { if (ValidatePublicIP($_SERVER[$keyword])) { $ip[] = $_SERVER[$keyword]; } } else { $ip[] = $_SERVER[$keyword]; } } } $ip = (empty($ip) ? 'Unknown' : implode(", ", $ip)); return $ip; } function ValidatePublicIP($ip) { if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) { return true; } else { return false; } } |
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sudo apt-get install apache2 apache2-utils sudo systemctl enable apache2 sudo systemctl start apache2 sudo apt-get install mysql-client mysql-server sudo mysql_secure_installation sudo apt-get install php7.2 php7.2-mysql libapache2-mod-php7.2 php7.2-cli php7.2-cgi php7.2-gd sudo nano /var/www/html/info.php |
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<?php phpinfo(); ?> |
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sudo a2enmod rewrite sudo apache2ctl configtest wget -c http://wordpress.org/latest.tar.gz tar -xzvf latest.tar.gz sudo rsync -av wordpress/* /var/www/html sudo chown -R www-data:www-data /var/www/html sudo chmod -R 755 /var/www/html |
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mysql -u root -p |
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CREATE DATABASE wp; GRANT ALL PRIVILEGES ON wp.* TO 'dbuser'@'localhost' IDENTIFIED BY 'password'; FLUSH PRIVILEGES; EXIT; |
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sudo mv wp-config-sample.php wp-config.php sudo nano wp-config.php sudo systemctl restart apache2.service sudo systemctl restart mysql.service |
Enable HTTPS supports:
Create a ssl-params.conf file and add the following definition below to it, then save it.
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$ sudo nvim /etc/apache2/conf-available/ssl-params.conf |
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# Cipherli.st Strong Ciphers for Apache url: https://cipherli.st/ # Addong some Strong SSL Security on Apache2 SSLCipherSuite EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH SSLProtocol All -SSLv2 -SSLv3 -TLSv1 -TLSv1.1 SSLHonorCipherOrder On Header always set Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" Header always set X-Frame-Options DENY Header always set X-Content-Type-Options nosniff # Requires Apache >= 2.4 SSLCompression off SSLUseStapling on SSLStaplingCache "shmcb:logs/stapling-cache(150000)" # Requires Apache >= 2.4.11 SSLSessionTickets Off |
Next thing to do is create a backup of the original default-ssl.conf file.
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$ sudo cp /etc/apache2/sites-available/default-ssl.conf /etc/apache2/sites-available/default-ssl.conf.bak |
Then modify it accordingly, we are deploying a wordpress site in this particular example we use the following adjustments.
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ServerName lnrsoft.ddns.net ServerAlias lnrsoft.ddns.net Redirect permanent / https://lnrsoft.ddns.net/ DocumentRoot /var/www/html Protocols h2 http:/1.1 <If "%{HTTP_HOST} == 'lnrsoft.ddns.net'"> Redirect permanent / https://lnrsoft.ddns.net/ SSLEngine on Options FollowSymLinks AllowOverride All Require all granted SSLProtocol +TLSv1.2 |
Enable HTTP2 supports:
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<VirtualHost *:443> ServerName lnrsoft.ddns.net ServerAlias lnrsoft.ddns.net Protocols h2 http:/1.1 <If "%{HTTP_HOST} == 'lnrsoft.ddns.net'"> Redirect permanent / https://lnrsoft.ddns.net/ </If> DirectoryIndex index.html index.php DocumentRoot /var/www ErrorLog ${APACHE_LOG_DIR}/lnrsoft.ddns.net.log CustomLog ${APACHE_LOG_DIR}/lnrsoft.ddns.net-access.log combined SSLEngine On SSLCertificateFile /etc/letsencrypt/live/lnrsoft.ddns.net/cert.pem SSLCertificateKeyFile /etc/letsencrypt/live/lnrsoft.ddns.net/privkey.pem SSLCertificateChainFile /etc/letsencrypt/live/lnrsoft.ddns.net/chain.pem <Directory /var/www> Options FollowSymLinks AllowOverride All Require all granted </Directory> </VirtualHost> |
It is also recommended adding strong ciphers for Apache to increase SSL Security on the server.
Part of my Best Practices to deploy a secure webserver, virtual personal server or database serve is to add the recommended ciphers from Cipherli.st.
You need to add the PPA. (Surce: “Linux Uprising” team)
Install:
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sudo add-apt-repository ppa:linuxuprising/java sudo apt-get update sudo apt-get install oracle-java12-installer sudo apt-get install oracle-java12-set-default |
For multiple java versions, install [or uninstall] oracle-java12-set-default package to set [or not] Java 12 as default.
Verify:
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post@lnrsoft:$ java --version java 12.0.1 2019-04-16 Java(TM) SE Runtime Environment (build 12.0.1+12) Java HotSpot(TM) 64-Bit Server VM (build 12.0.1+12, mixed mode, sharing) |
Remove it: … use the following command if you need to uninstall it:
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sudo apt-get remove oracle-java12-installer |
Sourcetrail a cross-platform source explorer, great and powerful tool to have it.
I personally recommend it for any junior or senior developers. A cross-platform source explorer for C/C++ and Java* deserves a blog post to reach more developers as well as serious commercial customers.
* Free for non-commercial use
Install Google Authenticator:
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sudo apt-get install libpam0g-dev make gcc wget autoconf libtool libpng-dev automake autotools-dev pkg-config libltdl-dev m4 cd ~ git clone https://github.com/google/google-authenticator-libpam.git cd google-authenticator-libpam ./bootstrap.sh ./configure make sudo make install |
Install qrencode:
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cd ~ wget https://fukuchi.org/works/qrencode/qrencode-4.0.2.tar.gz tar -xf qrencode-4.0.2.tar.gz cd qrencode-4.0.2/ ./configure make sudo make install sudo ldconfig |
Best Audio Quality for mp3 (with –ffmpeg-location):
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youtube-dl -f 'bestvideo[ext=mp4]+bestaudio[ext=mp3]/bestvideo+bestaudio' --extract-audio --audio-format 'mp3' --audio-quality '8' --ffmpeg-location '/addyourcustompath/ffmpeg' https://youtube.com/xxxxxxxxxx |
Best Audio/Video Quality for mp4 (with –ffmpeg-location):
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youtube-dl -f 'bestvideo[ext=mp4]+bestaudio[ext=m4a]/bestvideo+bestaudio' --ffmpeg-location '/addyourcustompath/ffmpeg' https://youtube.com/xxxxxxxxxx |
The best way to install the selenium package is using the following command:
$ pip install selenium
or on macOS with Homebrew
$ brew install geckodriver
If you are using Anaconda just simply activate your virtual environment and then install geckodriver using the following command:
$ conda install -c conda-forge geckodriver
Then you’ll need a driver to interface with the browser you choose. I used Firefox in this example, therefore I downloaded the required geckodriver driver.
Drivers for other browser: selenium-python.readthedocs.io
You might need to set the PATH of your geckodriver.
This python source code will pull up a Firefox window and open the url that you need set https://yourwpdomain.com/wp-login.php, then find user_login and user_pass elements on the page (by the id) and finally send a click() function to the submitButton.
If everything goes well the next thing you should see is your WordPress dashboard page in the browser.
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from selenium import webdriver browser = webdriver.Firefox() #browser = webdriver.Firefox(executable_path=r'your\path\geckodriver.exe') url = "https://yourwpdomain.com/wp-login.php" # set your WordPress domain browser.get(url) username = browser.find_element_by_id("user_login") password = browser.find_element_by_id("user_pass") username.send_keys("yourUserName") # add your WordPress UserName password.send_keys("yourPassword") # add your WordPress Password submitButton = browser.find_element_by_id("wp-submit") submitButton.click() |
If you are using Windows you might need to set the geckodriver PATH with FirefoxDriver.
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browser = webdriver.Firefox(executable_path=r'your\path\geckodriver.exe') |
You need to add a check_certificate = off line into your .wgetrc file in your Home directory.
Or simply run this command on your terminal.
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echo "check_certificate = off" >> ~/.wgetrc |
After this wget will add this –no-check-certificate automatically from your .wgetrc file.
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