HowTo Fix kolab_smtp_access_policy exit status 1 1

HowTo Fix kolab_smtp_access_policy exit status 1

This entry is part 1 of 1 in the series Unfucking Kolab Server

In case it happens to use Kolab with Ubuntu you might face the “kolab_smtp_access_policy exit status 1” error when sending or receiving emails! Kolab is definitely one-of-a-kind open source groupware server software out there. It’s the best! It’s so stable that can handle the day of reckoning! But after un-fucking the initial installation! Anyways … […]

How to install MacOS Sierra guest on VirtualBox on Ubuntu host 2

How to install MacOS Sierra guest on VirtualBox on Ubuntu host

Well, yeah, I was desperate to debug an app on mac OS so … You can have it run on Ubuntu host with VirtualBox. It works on other versions of Ubuntu and VirtualBox. Haven’t tested mac OS Mojave. If you try it, drop a line on the comments below to share with other desperate developers/sysadmins. […]

How to replace a single page in a PDF file using another PDF file in Linux 3

How to replace a single page in a PDF file using another PDF file in Linux

By using the PDF Toolkit PDFtk library you can do this simple pdf editing task and many more. For all of you creating software related to PDF documents you should really spend some time reading about PDFtk server. Installation:

Usage: In this example we have two pdf files with 10 pages each. The command […]

Real WordPress Cron Jobs 4

Real WordPress Cron Jobs

WP cron is one of the greatest features of WordPress. However, it’s irritating when your site is low traffic, or for whatever reason, wp cron refuses to work properly. You can’t schedule your postings or newsletter digests, social media re-posts, WAF scanning, etc. And if your plan is to get serious about your personal blog […]

Observium - Rename existing devices 7

Observium – Rename existing devices

In case you have a lot of devices monitored by observium and for a reason (a hypervisor migration maybe?) you need to change servers’ hostnames, observium, at the time being, doesn’t seem to support renaming via its web interface but you can successfully do it from the command-line. Read the instructions below. Change current directory […]

ssh refused: sshd[2444]: userauth_pubkey: key type ssh-dss not in PubkeyAcceptedKeyTypes [preauth] 8

ssh refused: sshd[2444]: userauth_pubkey: key type ssh-dss not in PubkeyAcceptedKeyTypes [preauth]

If you just upgraded Ubuntu 15.04/10 to Ubuntu 16.04 LTS (or otherwise upgraded OpenSSH from v6.9 to v7.0 you may be getting the ssh refusal because of changes in OpenSSH. I was specifically getting this error in the /var/log/auth.log (via Webmin): sshd[2444]: userauth_pubkey: key type ssh-dss not in PubkeyAcceptedKeyTypes [preauth]. For this specific error, you […]

Fix nethogs 'creating socket failed while establishing local IP' 9

Fix nethogs ‘creating socket failed while establishing local IP’

As it’s not available in repo nor PPA you need to build it (it is really easy and quickly done). Fetch and extract

Install dependencies and build

Check and run

Source

use utf8 you slackers

#Outlook 2007 & 2010 – Change encoding to UTF-8

Slacker-ism in IT is something we all went through!! But Enough is Enough! Stop doing it right now! If you’re already reading these lines, you already know why you are here… So it’s beyond the scope of this article to explain what character encoding is or why you should change it to UTF-8 immediately! Therefore, […]

sysadmin tutorials conky totallynoob_orange

Make your #Ubuntu #Gnome 15.10 desktop cocky again! #conky

Conky is an exceptional system monitor for X, that displays any kind of information on your desktop. If you haven’t met conky until now, do so here. In this tutorial you will install the latest conky manager (2.4 at the time of writing) and some other tools, usually being used by conky themes and widgets. […]

Vagrant repackaging box from existing one #vagrant 10

Vagrant repackaging box from existing one #vagrant

This entry is part 1 of 1 in the series Vagrant

Vagrant repackaging is a hacky way to create a new vagrant box from an existing one, which is already configured and well tested. In this article, scope is not to explain the benefits of using virtualization in your development workflows. As well, I’m assuming that you: already have the latest vagrant installed, hostupdater plugin and […]