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Category: Linux

How to obtain Let’s Encrypt SSL Certificate for Apache or Nginx using Certbot
Featured, Linux, Web Server

How to obtain Let’s Encrypt SSL Certificate for Apache or Nginx using Certbot

ServerDiary

Now SSL is one of SEO (Search Engine Optimization) signal. Read it on Google Webmaster Blog. If you only has one or two websites, there is not a big problem.…

How to check UDP connection on Linux using Conntrack
Linux

How to check UDP connection on Linux using Conntrack

ServerDiary

This linux command line to check UDP connection on Linux using Conntrack command. If you want to exclude localhost, you can using grep

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

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

ServerDiary

Lsyncd watches a local directory trees event monitor interface (inotify or fsevents). It aggregates and combines events for a few seconds and then spawns one (or more) process(es) to synchronize…

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
Linux

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

ServerDiary

If you have error warning on CSF (ConfigServer Security & Firewall) on Linux servers when start or restart CSF like the following message: It’s caused by bind-utils package not installed.…

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

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

ServerDiary

If you have trouble apache or PHP-FPM can not connect to remote MySQSL server, example error on PDO connection on remote server like below First you need to check is…

How to Sync Directories Using Rsync with Custom SSH Port
Linux

How to Sync Directories Using Rsync with Custom SSH Port

ServerDiary

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…

Linux

How to make symbolic link on Linux chroot or jail user

ServerDiary

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
Linux, MAC OS

Encrypt your files with VeraCrypt on Linux, Windows, Mac OS and Android

ServerDiary

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
Linux, MAC OS

How to create encrypted disk image with Linux LUKS format using Cryptsetup

ServerDiary

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
Linux, Web Server

How to block bad bots LieBaoFast, MQQBrowser and Mb2345Browser using Fail2ban

ServerDiary

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
Featured, Linux

Webdav VS Samba / CIFS file system write and read speed test

ServerDiary

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
Linux

How to clear swap usage on Linux

ServerDiary

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…

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