Tag Archives: linux tutorials

How to flush/clear the pfsense DNS forwarder cache

How to flush/clear the pfsense DNS forwarder cache

I am using the pfSense based firewall. How do I clear the unbound DNS forwarder cache when using the pfSense firewall?
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How to set up MariaDB Master-Slave replication with SSL on Ubuntu Linux

How to set up MariaDB Master-Slave replication with SSL on Ubuntu Linux
How do I setup Master-slave data replication using MariaDB server on Ubuntu Linux 16.04 LTS server? How do I encrypt replication traffic so that the data get encrypted in transit, protecting my data and users from snooping? Master-slave data replication allows you to copy databases to multiple MariaDB servers. This is useful for backup, data […]
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How to enable Wake on Lan (WOL) with Advanced TomatoUSB wifi router firmware

How to enable Wake on Lan (WOL) with Advanced TomatoUSB wifi router firmware
I recently installed TomatoUSB advanced firmware on my Asus RT-AC66U wifi router. This router act as my wireless Ethernet bridge. TomatoUSB advanced has additional features like

  • SSH
  • Multiple WAN support (3G/4G/Static IP/Cable/ADSL2)
  • Tor
  • Virtual Wireless
  • DMZ
  • IPv6
  • FTP/Media server via USB
  • BiTorrent Client via USB
  • UPS support
  • OpenVPN client and server
  • Tinc VPN server and much more.

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Fixing WordPress: ‘Briefly unavailable for scheduled maintenance. Check back in a minute’ error

Fixing WordPress: ‘Briefly unavailable for scheduled maintenance. Check back in a minute’ error
So I ran into this problem. No matter what I did my WordPress installation displayed a stupid error that read as follows:

Briefly unavailable for scheduled maintenance. Check back in a minute.

Fig.01: How to Fix Briefly Unavailable for Scheduled Maintenance Error in WordPress
Here is how to fix this problem with WP.
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How to get common name (CN) from SSL certificate using openssl command

How to get common name (CN) from SSL certificate using openssl command

I configured and installed a TLS/SSL certificate in /etc/ssl/ directory on Linux server. I was wondering if can I find out the common name (CN) from the certificate using the Linux or Unix command line option?
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How to configure Lighttpd web server with free Let’s Encrypt SSL certificate on Debian or Ubuntu Linux

How to configure Lighttpd web server with free Let’s Encrypt SSL certificate on Debian or Ubuntu Linux

I read your Nginx and Let’s Encrypt free SSL certificate tutorial. However, I use Lighttpd web server on AWS cloud. How do I secure my Lighttpd web server with Let’s Encrypt free SSL certificate on my Ubuntu Linux 16.04 LTS or Debian Linux 8.x server?
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Ubuntu Linux Remove/Delete PPAs apt-get command

Ubuntu Linux Remove/Delete PPAs apt-get command
Over time I have added way too many PPAs using the add-apt-repository command on Ubuntu Linux 16.04 LTS server for testing purpose. How can I delete or remove those PPAs? Is there a command to list all PPAs? Yes, you can delete or remove a PPA. You must have root privileges to achieve this task. […]
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