yajrendrag

Background

I first came across PostfixAdmin upon implementing my first mailserver using this guide - https://www.exratione.com/2016/05/a-mailserver-on-ubuntu-16-04-postfix-dovecot-mysql/ and it's successor on Ubuntu 18.04. With the release of Ubuntu 20.04.1, i began looking around for an update and came upon the ISPMail guide as it had a few things I had wanted to try out - namely, rspamd, and encryption. But i wanted to be able to continue to use PostfixAdmin as i wanted to preserve the GUI administration of the database. So i began to implement the guide and figure out how i could integrate PostfixAdmin into it. This is the result.

Assumptions

1. PostfixAdmin sets up the database schema (ie, no need to manually create the database tables with SQL)
2. Presumption in guide below is that the Apache document root is /var/www/html
3. For support of encryption, part 2 of guide below shows how to modify PostfixAdmin (& roundcube) to generate / modify user encryption keys, so once a user's account is setup,

mortenson

Random notes from woring with a new XPS 13 9300 with Ubuntu

Notes from when I was on the default Dell OEM Ubuntu

Disable trackpad middle click:

sudo vim /usr/share/X11/xorg.conf.d/40-libinput.conf

Add Option "ButtonMapping" "1 1 3 4 5" under

ruanbekker

My Elasticsearch cheatsheet with example usage via rest api (still a work-in-progress)

Shortlinks:

• Cluster Health
  • Index Level
  • Shard Level
• Nodes Overview
• Indices Overview
• Cluster Maintenance

koheyamada

Error 'Table 'mysql.rds_heartbeat2' doesn't exist' on query. Default database: 'mysql'. Query: 'INSERT INTO mysql.rds_heartbeat2(id, value) values (1,1493274809584) ON DUPLICATE KEY UPDATE value = 1493274809584'

waja

#!/bin/sh
MYSQLADMIN_CFG="/etc/mysql/mariadb.conf.d/90-mysqladmin.cnf"
# generate password
PASS=$(perl -e 'print map{("a".."z","A".."Z",0..9)[int(rand(62))]}(1..16)');
# adjust /etc/mysql/debian.cnf (used as defaults file by system scripts)
sed -i "s/^password =.*$/password = ${PASS}/" /etc/mysql/debian.cnf
sed -i "s/^user     =.*$/user     = debian-sys-maint/" /etc/mysql/debian.cnf
# create config file for mysqladmin itself (maybe not needed)
umask 066
cat > ${MYSQLADMIN_CFG} <<EOF

avafloww

/*<?php
//*/public class PhpJava { public static void main(String[] args) { System.out.printf("/*%s",
//\u000A\u002F\u002A
class PhpJava {
    static function main() {
        echo(//\u000A\u002A\u002F
        "Hello World!");
}}
//\u000A\u002F\u002A
PhpJava::main();

Manc

[Unit]
Description=Consul service discovery agent
Requires=network-online.target
After=network.target

[Service]
User=consul
Group=consul
PIDFile=/run/consul/consul.pid
Restart=on-failure

nurtext

# Let apache know we're behind a SSL reverse proxy
SetEnvIf X-Forwarded-Proto "https" HTTPS=on

# Redirect to HTTPS
<IfModule mod_rewrite.c>
  RewriteEngine on
  RewriteCond %{HTTPS} !=on
  RewriteCond %{HTTP:X-Forwarded-Proto} !https [NC]
  RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
</IFModule>

warewolf

My incoming calls land in the context from-trunk

Config to block calls

/etc/asterisk/extensions.conf

[from-trunk]
...
 same =>    n,GotoIf($[${DB(blockcaller/${CALLERID(num)})} = 1 ]?blocked)
 same => n(blocked),Hangup

okulik

Provisioning EC2 instance for ElasticSearch

EC2 instance type

Use c3.xlarge instance or c3.2xlarge instance to store ElasticSearch server. We need a fair bit of RAM and computing power, as well as 2 SSD disks for storage. We need to choose exising IAM role or create a new one so that ElasticSearch can seamlessly discover other cluster nodes hosted on EC2. Also, don't forget to add both SSDs to the list of devices (/dev/sdb and /dev/sdc).

Linux system modification

Increase number of open file handles

First we need to increase system-wide file descriptor limits. To make it work temporary (will reset on the next reboot) execute from bash: