followed your tutorial to install an OpenVPN on my Ubuntu
server in the cloud. How can I install Pi-hole to block ads, reduced my 4G/3G/LTE traffic on the same Debian or Ubuntu Linux server? [click to continue…] Sysadmin because even developers need heroes!!!
TTP Strict Transport Security (HSTS) is a security feature that lets your web site tell client browsers that it should only be communicated with using HTTPS only. How can I setup HSTS using lighttpd web server on Linux or Unix-like system? [click to continue…]
very serious security problem has been found in the Linux kernel. A 0-day local privilege escalation vulnerability has existed for eleven years since 2005. This bug affects all sort of of Android or Linux kernel to escalate privileges. Any user can become root in less than 5 seconds. The bug has existed since Linux kernel version 2.6.22+. How do I fix this problem? [click to continue…]
am a regular Linux system user. In Linux (especially CentOS), I am used to applying updates a few times a week using yum command
, but how do I do that on my OpenBSD severer? How do I apply updates on OpenBSD operating system? [click to continue…]
y Linux shell user can modify their password using the passwd command. How can I force users to choose the secure password that will prevent users from using stupid passwords like “abc123”, “password”, “123456” and so on? How do I setup password quality requirements on my Debian or Ubuntu Linux server? [click to continue…]
have installed wireless mini-PCIe card for my pfSense firewall. How do I configure a bridged LAN wifi access point (AP) network and setup pfSense? [click to continue…]
A serious vulnerability was discovered in how CGI scripts are used by Linux or Unix that use PHP, Go, Python, and other scripting languages. How do I fix Httpoxy a CGI application vulnerability on Linux or Unix for HAProxy, Varnish, Nginx, PHP, Go, Python, Tomcat and others?
[click to continue…]
am a new Ubuntu Linux server user. How do I setup an OpenVPN Server on Ubuntu Linux version 14.04 or 16.04 LTS server to shield my browsing activity from bad guys on public Wi-Fi, and more? [click to continue…]
very serious security problem has been found in the Linux kernel. A 0-day local privilege escalation vulnerability has existed since 2012. This bug affects millions of Android or Linux applications to escalate privileges. Any server or desktop (32 or 64 bit) with Linux Kernel version 3.8+ is vulnerable
. How do I fix this problem? [click to continue…]
am using UFW to manage firewall on my Ubuntu Linux 12.04/14.04 LTS server. I need to block a specific IP address from accessing my server. How do I block an IP address using ufw? [click to continue…]