Time To First Byte (TTBF)

How to Check TTFB (Time To First Byte) using CURL

Time to first byte (TTBF) is one of the many…

How to install Xvfb and create systemd Xvfb service on CentOS 7 / 8 or RHEL 7 / 8

Xvfb or X virtual framebuffer is a display server implementing…

How to check UDP connection on Linux using Conntrack

This linux command line to check UDP connection on Linux…

How to auto sync file to another server using Lsyncd on Centos 7

Lsyncd watches a local directory trees event monitor interface (inotify…

How to SELinux allow Apache or PHP-FPM connect remote MySQL

If you have trouble apache or PHP-FPM can not connect…

How to Sync Directories Using Rsync with Custom SSH Port

SSH default port is 22, every body knew it. And…

How to make symbolic link on Linux chroot or jail user

Sometimes we need to create a jailed user on Linux…