Enable Linux Password Authentication on Cloud VPS
Most Cloud Providers do not allow you to log in directly using Password. It will ask you to use public/private key to log in. This post is using AWS EC2…
Install and Configure ngx_lua_waf Based on Nginx+Lua ( OpenResty)
Ngx_lua_waf is a web application firewall based on lua-nginx-module. Prevent SQL injection, local inclusion, partial overflow, fuzzing, xss, SSRF and other web attacks Prevent file leaks, such as svn /…
Set Up Let’s Encrypt Certs with Nginx Server Using CertBot
Certbot website has explained very well all steps for most of linux OS and situation. You wont get wrong as long as you read the steps carefully. https://certbot.eff.org/ This post…
Change Linux SSH Port from 22 to 2222
The default SSH port on all Operating Systems is port 22. For security measures, it is recommended to use other port instead, such as 2222, 2200. The configuration file located…
CentOS Change Kernel
Download replacement kernel The CentOS6 kernel is replaced with: 2.6.32-504.3.3.el6.x86_64
Change Linux CentOS Ethernet Interface Name to Default eth0
Disable Consistent Interface Device Naming To regain the ethX back, edit the grub file. vi /etc/default/grub Look for GRUB_CMDLINE_LINUX and add or change to the following net.ifnames=0. FROM: GRUB_CMDLINE_LINUX="crashkernel=auto resume=/dev/mapper/cl-swap…
Connect to GNOME desktop environment via XRDP on CentOS 7 & Ubuntu 18
It might not make sense to use RDP to remote linux machines. The speed and performance all are not that good from my point to view. But in certain situation,…
Linux CentOS/Ubuntu Firewall and SELinux
The Linux kernel includes the Netfilter subsystem, which is used to manipulate or decide the fate of network traffic headed into or through your server. All modern Linux firewall solutions…
Linux System Performance Analytics
This post is going to use an java code example to show the process how to analysis linux system performance issue using all kinds of Linux internal commands without other…
Deploy Zabbix Agent into CentOS and Add into Zabbix Server
Zabbix Agent is required to install on all remote systems needs to be monitor through Zabbix server. The Zabbix Agent collects resource utilization data and applications data on the client…
Quickly Deploy Zabbix in CentOS7
Zabbix is a mature and effortless enterprise-class open source monitoring solution for network monitoring and application monitoring of millions of metrics. This post is going to install zabbix4.0 into a…