How to Check TTFB (Time To First Byte) using CURL
Time to first byte (TTFB) is one of the many reasons why a website is fast or slow. Now, Google
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Author: ServerDiary
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 the X11 display server protocol. In contrast to other display
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Auto renew Let’s Encrypt SSL Certificate using Systemd and restart Nginx / Apache if success
On other post, we create an article how to obtain Let’s Encrypt SSL Certificate on Centos 6/7/8 or RHEL 6/7/8.
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How to obtain Let’s Encrypt SSL Certificate for Apache or Nginx using Certbot
Now SSL is one of SEO (Search Engine Optimization) signal. Read it on Google Webmaster Blog. If you only has
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How to check UDP connection on Linux using Conntrack
This linux command line to check UDP connection on Linux using Conntrack command. If you want to exclude localhost, you
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How to auto sync file to another server using Lsyncd on Centos 7
Lsyncd watches a local directory trees event monitor interface (inotify or fsevents). It aggregates and combines events for a few
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CSF Error: *WARNING* Binary location for [HOST] [/usr/bin/host] in /etc/csf/csf.conf is either incorrect, is not installed or is not executable
If you have error warning on CSF (ConfigServer Security & Firewall) on Linux servers when start or restart CSF like
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How to SELinux allow Apache or PHP-FPM connect remote MySQL
If you have trouble apache or PHP-FPM can not connect to remote MySQSL server, example error on PDO connection on
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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
Read moreHow 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
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