How to Sync Directories Using Rsync with Custom SSH Port
SSH default port is 22, every body knew it. And it will cause many brute force SSH attacks. For security reasons, Linux administrator should change to custom port to securing…
Category: Linux
How to make symbolic link on Linux chroot or jail user
Sometimes we need to create a jailed user on Linux to restrict that user. However, sometimes we need the jailed user to be able to access directories outside the home…
Encrypt your files with VeraCrypt on Linux, Windows, Mac OS and Android
This article will guide you how to secure your files using VeraCrypt, a free and open source encryption tools and multi platform, works on Windows, Linux and Mac OS, available…
How to create encrypted disk image with Linux LUKS format using Cryptsetup
If you have sensitive data or file, you can make an iso image on Linux. For example backup file, photo or even your source code, so no one can stole…
How to block bad bots LieBaoFast, MQQBrowser and Mb2345Browser using Fail2ban
Our server suddenly got big traffic and this traffic detected on Google Analytics. This spike traffic increase 1000 % – 2000 %. Our server resource very high, and CPU usage…
Webdav VS Samba / CIFS file system write and read speed test
We made simple benchmark to compare Webdav vs Samba / CIFS file system write and read speed. On local Intranet, we may be familiar with sharing files via your company…
How to clear swap usage on Linux
Swap is disk memory when physical Random Access Memory (RAM) is full. We know that disk write and read speed is very slow compared to RAM. But it not safe…
Monitor your Linux system health using Glances
Almost all Linux administrators know default real time Linux system health monitoring using ‘top’ command. But unfortunately, top command does not have good display and result. There is available tools,…
Real time monitor linux network and bandwidth using Iftop
Sometimes we need to monitor bandwidth and analyst network usage on server. There are many tools to do this. The simplest and fast tools is only using command line on…
How to install and use iPerf3 to measure bandwidth
This article will tell you how to install and use iPerf3 to measure bandwidth. iPerf3 is a tool to measure of the maximum achievable bandwidth on IP or networks. It…
How to install and configure Munin on Centos
Munin the power full monitoring tool monitor all of your servers or computers and remembers what it saw. It presents all the information in graphs through a web interface and…
How to install and configure Nginx ModSecurity on Centos 8
ModSecurity is an open source and great module to securing sites against Layer 7 attacks. Nginx ModSecurity will prevent SQL injection (SQLi), local file inclusion (LFI), and cross‑site scripting (XSS). Getpagespeed.com…