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Topics

On this page

• Amazon AWS

  • Amazon ELB and multi-domain SAN/SSL Setup
  • Auto Scaling
  • Change Instance Type in AutoScaling

• Backup

  • Duplicity + Amazon S3

• Benchmark

  • apachebench
  • httperf
  • Siege

• CDN

  • Amazon Cloudfront CDN with W3 Total Cache WordPress
  • CDN.NET Configuration with W3 Total Cache Wordpress
  • CDN77 Configuration with W3 Total Cache WordPress

• Composer and WordPress

  • Getting Started
  • Git and File-System Layout (non-default setup)
  • Version Constraints
  • Managing Themes and Plugins (for entire WordPress site)
  • Updating Themes and Plugins (for entire WordPress site)
  • Adding Composer Support to Your Own Themes and Plugins (for developers)
  • Using Composer to Manage Own Theme/Plugin Dependencies (for developers)

• Docker and WordPress [WIP]

  • Kubernetes

    • WordPress with Kubernetes using Minikube and Helm on localhost (MacOS)

• Git

  • Git – Resolve Merge Conflicts
  • First time Git setup
  • Forking the Git
  • Mandatory stages in Git

• Gitlab

  • Gitlab-CE
  • gitlab-ci-multi-runner

• KVM

  • Convert qcow2 to raw format
  • Enable virtio for existing VM's

• Mac

  • Brew'ing PHP, MySQL & Nginx on Mac OS X

• Monitoring

  • Latest Monit setup on Ubuntu
  • NewRelic Setup for Ubuntu Server with PHP, FPM, Nginx and MySQL

• node.js

  • Installing ghost with nginx proxy-cache
  • Latest node.js & npm installation on Ubuntu 12.04

• Plesk

  • List Mailboxes Storage and Passwords

• Redis

• Standards

  • PHP

    • Code Sniffer

• Vagrant

• wpcli

  • Finding a faulty plugin
  • wp profile command

• Linux

  • Assigning Multiple IP Addresses to Single LAN Card
  • Disable IPv6 on Ubuntu 12.04
  • dsh – distributed shell
  • fdupes – find & replace duplicate files with hardlinks
  • GPG Keys Cheatsheet
  • Increase "Open Files Limit"
  • kill all php, nginx, mysql or any kind of processes
  • Passwordless Authentication for SSH
  • Screen
  • search replace in multiple files useing grep xargs sed
  • Setup sftp
  • sysctl.conf
  • Timezone Sync
  • Using Google Public DNS on Ubuntu Server
  • Using openssl to match private key, cerificate and CSR
  • Configure Postfix to Use Gmail SMTP on Ubuntu
  • Logrotate Example for Custom Logs
  • PHP 5.5, MySQL, Postfix, Nginx and WordPress on Ubuntu
  • Serverdensity
  • Upgrade Ubuntu 10.04 to 12.04
  • Using find and sed to replace strings in multiple files
  • Webmin

• Apache – Turn On/Off Directory Listing

• Enabling FastCGI on MediaTemple

• Manage SVN Users with htpasswd

• Mysql

  • .my.cnf – mysql user & password
  • Analyse slow-query-log using Anemometer
  • Improving MySQL Query Cache
  • MySQL Query Profiling
  • Reset MySQL root password
  • tuning-primer.sh – an alternative for mysqltuner
  • Using MariaDB 10
  • Install/Upgrade to MySQL 5.6 on Ubuntu 12.04 LTS
  • Change WordPress Domain Name
  • Character Sets and Collations
  • Enable innodb_file_per_table
  • Enable Remote Access (Grant)
  • Installing Percona Toolkit
  • Using tmpfs for temporary folder creation
  • YARPP and InnoDB
  • Convert MyISAM to InnoDB
  • Using tmpfs for mysqldump & mysqlimport
  • Convert from INNODB to MYISAM
  • Analyse slow-query-log using mysqldumpslow & pt-query-digest
  • mysqlcheck with cron to optimize automatically
  • Using MySQLTuner to Optimize MySQL configuration

• Emails

  • Checking FQDN, Reverse-DNS/PTR, MX record

  • Clients

    • Apple Mail
    • Mozilla Thunderbird

  • DKIM with Postfix

  • Postfix Queue Management

  • RoundCube

    • Forwarding all mails to other email id

  • Server Setup

    • Packages & Conventions

    • Postfix, Dovecot, ViMbAdmin, RoundCube

    • Amavis, Spamassassin & ClamAV Setup

    • Sieve Mail Filtering Setup

    • Mail-Server Testing

      • Antivirus Tests
      • IMAP Tests
      • POP Tests
      • SMTP Tests
      • Spam Tests

    • Mailserver Port Numbers

  • Setup OpenDKIM

  • SPF Records

  • swaks – SMTP test tool

  • Using larch for mail transfer between imap/gmail servers

  • Debugging Postfix Config, Mail Logs & more

  • Increasing Attachment Size in Posfix

• Nginx

  • Adding $upstream_cache_status in HTTP Response Headers

  • Amazon Elastic Load Balancer and Forwarding Real-IP Nginx

  • Block wp-login.php bruteforce attack

  • Configuring HTTP/2 Server Push

  • Enable gzip compression

  • fail2ban

  • Filter query string for Redis-Nginx cache

  • Let's Encrypt with EasyEngine

  • Nginx's Open file cache

  • Serving fonts with correct mime types

  • SSL – PCI compliance and performance optimization

  • Troubleshooting

    • Error: pcre_compile() failed: unrecognized character after
    • [emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use)

  • Tweaking fastcgi-buffers

  • Using $upstream_cache_status in access.log

  • Using Pagespeed

  • Weak Diffie Hellman Logjam Attack Fix

  • Website access restriction using nginx

  • Enable Nginx Status Page

  • Forwarding Visitor's Real-IP + Nginx Proxy/Fastcgi backend correctly

  • Parsing access.log and error.logs using linux commands

  • Debugging Nginx Configuration

  • Nginx config for www to non-www and non-www to www redirection

  • Optimizing Nginx Configuration

  • Rewrite Rules for vBulletin SEO-friendly permalinks

• PHP

  • Directly connect to PHP-FPM
  • Generating core-dump for php5-fpm
  • GeoIP
  • Having php5 and php7 on same system.
  • Install Xdebug and configure it with webgrind
  • Installation of PHP Code Review Tools
  • memcache
  • PHP's Zend Opcache Config & Web Viewer
  • Setting Sqlite support with PHP
  • Using HHVM with PHP-FPM Fallback
  • Using Redis for PHP Sessions on Ubuntu Server
  • Installing PhpMyAdmin Quickly
  • Moving PHP's session storage to tmpfs
  • Install Xdebug and configure it with Netbeans
  • Nginx – Enable PHP-FPM Status Page
  • PHP-FPM: Socket vs TCP/IP and sysctl tweaking
  • APC Cache Optimization & Monitoring Using Web Interface
  • Checking if PHP/WordPress can send mails
  • Debugging PHP Scripts Using slow_log and more
  • Increase file upload size limit in PHP-Nginx
  • Increase PHP script execution time with Nginx

• ActiveCollab with Nginx + APC Cache

• WordPress

  • Performance Optimization
  • Remove Query string of css/js files
  • Setup ElasticSearch with ElasticPress
  • Using Redis for WordPress Object-Cache
  • WooCommerce Window Shopping Caching Technique
  • Moving WordPress To New Server (Faster)
  • Better wp-cron using linux's crontab
  • 404 error- Page not Found!!!
  • Debugging WordPress with Nginx

SPF Record for your server

SPF Record and Google Apps

Testing SPF Record

SPF Records

SPF Record for your server

You can create any simple record like:

			v=spf1 a mx ptr ~all
		

Significance of every letter:

• a means A-record. This means IP of this domain.
• mx records indicate server which accepts mail for this domain. If same mail-server generate outgoing email, accept them.
• ptr records can help you verify all subdomain for your server. Generally ptr record is linked to FQDN which is different than root domain. This part makes sure mails sent from host.example.com are also accepted.
• ~all has 2 more variants -all and ?all.  ~ (tidal) results in soft-fail. – (minus) result in hard-fail. If you are new to SPF record, don’t use this. ? (question-mark) means neutral which is as bad as not using SPF at all IMHO!

If you need any help to get SPF record right, you can use spfwizard.com

SPF Record and Google Apps

If you are using Google Apps, then you may be using following for SPF record:

			v=spf1 include:_spf.google.com ~all
		

Now, in addition to Google’s server, your own web-server (where you are hosting your site) most likely sending emails on behalf of your domain.

You can add your server’s IP using a shortcut below:

			v=spf1 a include:_spf.google.com ~all
		

If you compare with previous record, it has only an extra “a”, which means IP address(es) to which A-Record for your domain points.

We are using:

			v=spf1 a ptr include:_spf.google.com ~all
		

Testing SPF Record

You can use excellent web-based tool mail-tester.com.

Setup OpenDKIM

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swaks – SMTP test tool

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