Linux

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.…

3 weeks ago

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…

3 weeks ago

How to check UDP connection on Linux using Conntrack

This linux command line to check UDP connection on Linux using Conntrack command. # conntrack -L -p udp If you…

4 months ago

How to auto sync modified 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…

4 months ago

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…

5 months ago

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…

6 months ago

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…

6 months ago

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…

8 months ago

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…

8 months ago

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…

8 months ago