What’s Redis Redis is an in-memory data structure store, used as a database, cache, and message broker. It supports data structures such as strings, hashes, lists, sets, sorted sets...
What’s NextCloud Nextcloud is an open-source software suite that offers a secure, self-hosted alternative to popular cloud storage and productivity platforms. With a focus...
What’s QUIC QUIC (Quick UDP Internet Connections) is a transport layer network protocol developed by Google. QUIC supports a set of multiplexed connections between...
Edit boot menu on-the-go 0. reboot the CentOS 7 and press ESC when GRUB menu show up on the screen and press “e” 1....
Check PHP-FPM version on NGINX HTTP response $ curl -I localhost/index.php HTTP/1.1 200 OK Date: Sat, 12 Aug 2017...
How to hide `Server:` Response info on NGINX $ curl -I localhost HTTP/1.1 200 OK Server: nginx/1.4.6 (Ubuntu) Date:...
Check disk usage df -h Filesystem Size Used Avail Use% Mounted on /dev/vda1 95G 82G 7.9G 92% / Check...
How to block ip with NGINX 0. define block ip on nginx.conf vim /etc/nginx/nginx.conf http { geo $ban_ip {...
How to sent xymon/hobbit alerts to slack channel 0. create bash script to push xymon/hobbit alerts to slack vim /etc/xymon/scripts/alert_to_slack.sh #!/bin/bash...
How to set up redirect www and non-www http to non-www https o nginx config file vim /etc/nginx/sites-enabled/blackonsole.conf # http server...
CSS Fonts Missing on web The error some like: Font from origin 'http://css.blackonsole.org' has been blocked from loading by Cross-Origin Resource...
Error courier imapd.pem file tailf /var/log/mail.log imapd-ssl: couriertls: /etc/courier/imapd.pem: error:0906D06C:PEM routines:PEM_read_bio:no start line How to fix vim /etc/courier/imapd-ssl Make sure dhparams.pem...
What is AutoMysqlBackup AutoMySQLBackup with a basic configuration will create Daily, Weekly and Monthly backups of one or more of your...
What is CSF Config Server Firewall (or CSF) is a free and advanced firewall for most Linux distributions. How to add...
What is AWStats AWStats is short for Advanced Web Statistics. AWStats is powerful log analyzer which creates advanced web, ftp, mail and streaming server...
What is Gitlab GitLab is a web-based Git repository manager with wiki and issue tracking features. How to install...
What is Archipel Archipel is a solution to manage and supervise virtual machines. No matter if you have a...
What is this Puppet: a free (libre) configuration management utility. It runs on many Unix-like systems as well as on Microsoft...
What is Pound Load Balancer The Pound program is a reverse proxy, load balancer and HTTPS front-end for Web server(s). Pound...
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How to setup Postfix to fighting spam with PostGrey and RBL in Ubuntu Linux + Installing PostGrey apt-get install postgrey +...
:: Error in cronjob ERROR: Problem with internal logger (UpdateLogFile = /var/log/clamav/freshclam.log). ERROR: Can't open /var/log/clamav/freshclam.log in append mode (check permissions!)....
:: rsyslog error in Ubuntu If you got some error log like this when starting rsyslog service: server rsyslogd-2039: Could not...
:: How to transfer data from remote to remote server + file scp -3 host1:/path/to/file host2:/path/to/file + directory scp -r -3...
:: git error with vi error: There was a problem with the editor 'vi' :: how to fix the problem...
:: Whatis Pound Pound Load Balancer – HTTP/HTTPS reverse-proxy and load-balancer :: How to install Pound Load Balancer yum -y...
:: What is Setting OpenVPN with static key are ideal for point-to-point VPNs or proof-of-concept testing. :: Installing OpenVPN Server in...
