Posts

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Remmina/Ubuntu 14.04

If you have having issues with Remove Desktop - Go to advance settings and set security specifically to RDP instead of negotiate and click "Save".

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Changing your Mac Address

Generate a new Mac Address
perl -e 'for ($i=0;$i<5;$i++){@m[$i]=int(rand(256));} printf "02:%X:%X:%X:%X:%X\n",@m;'

Start Changing
sudo ifconfig en0 ether 02:8D:DE:BC:7E:72

How to Change Your Mac Address:

www.howtogeek.com/192173/how-and-why-to-change-your-mac-address-on-windows-linux-and-mac/

How are Mac Addresses assigned and Unique:

www.howtogeek.com/228286/how-is-the-uniqueness-of-mac-addresses-enforced/

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Remote Execution Commands

Here are some of the tools I have used in the pass to do various things. If I have to use something today then that would be SSH and Ansible for any mass operations

For all small jobs I generally go with SSH safe and secure.
Here are some of the examples of how you can put SSH to use. Make sure you setup credential keys for ease.

www.cyberciti.biz/faq/unix-linux-execute-command-using-ssh

www.cyberciti.biz/faq/linux-unix-osx-bsd-ssh-run-command-on-remote-machine-server

Following is the tool that allows you execute commands on multiple hosts. This is Python based.

www.tecmint.com/execute-commands-on-multiple-linux-servers-using-pssh

Ansible:

ansible-tips-and-tricks.readthedocs.io/en/latest/ansible/commands/#running-ad-hoc-commands

On Windows machine I used PowerShell. I find powershell too complicated and cryptic

www.howtogeek.com/117192/how-to-run-powershell-commands-on-remote-computers

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Install Kodi Media Manager for Ubuntu

Refer: http://kodi.wiki/view/HOW-TO:Install_Kodi_for_Linux

$ sudo apt-get install software-properties-common
$ sudo add-apt-repository ppa:team-xbmc/ppa
$ sudo apt-get update
$ sudo apt-get install kodi
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Installing Lync on Mac Book

Use these settings:

1. Go to Keychain
2. Click on System
3. Then go to HAL Enterprise root CA
4. And click Always Trust on “When using this Certificate”

Lync settings:

Either automatic as it is now,
or manual, depending on how they’re connected:

But make sure their internet proxy is set to the automatic config script:
http://wpad.flagship.hal.com/wpad.dat

Manual Settings:

Internal Server Name: hallyncpool
External Server Name: BLANK

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Enable SSH in Ubuntu 14.04 Trusty Tahr and 18.04

For 18.04 you will need to install through Synaptic

This simple tutorial is going to show you how to enable Secure Shell (SSH) service in Ubuntu 14.04 Trusty Tahr.

Secure Shell (SSH) is a cryptographic network protocol for secure data communication, remote command-line login, remote command execution, and other secure network services between two networked computers.

SSH is not enabled by default in Ubuntu, but you can easily enable this service via OpenSSH, a free version of the SSH connectivity tools developed by the OpenBSD Project.

To do so, run the command below in terminal:

sudo apt-get install openssh-server

Remove login with root password

$ sudo nano /etc/ssh/sshd_config

# Authentication:
LoginGraceTime 120
PermitRootLogin no

Or install the openssh-server package via Ubuntu Software Center if you’re on Desktop edition:

install ssh server Ubuntu 14.04

Once installed, you can change the port, disable root login and do other changes by editing the config file:

sudo gedit /etc/ssh/sshd_config

Finally restart the ssh server to take place:

sudo /etc/init.d/ssh restart

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Setup SSL for nginx for Ubuntu 14.04

Refer: https://www.digitalocean.com/community/tutorials/how-to-create-an-ssl-certificate-on-nginx-for-ubuntu-14-04

Install nginx

sudo apt-get update
sudo apt-get install nginx

Setup SSL Self-signed Cert, Good for 10 Years

sudo mkdir /etc/nginx/ssl
sudo openssl req -x509 -nodes -days 3650 -newkey rsa:2048 -keyout /etc/nginx/ssl/nginx.key -out /etc/nginx/ssl/nginx.crt

Here's an example for local.hollandamerica.com, it creates files in folder the same place your run it.

openssl req -x509 -newkey rsa:2048 -nodes -keyout cert.key -out cert.crt -days 3650 -subj "/C=US/ST=State/L=Locality/O=Organization/CN=local.hollandamerica.com"

Sample Values

Country Name (2 letter code) [AU]:US
State or Province Name (full name) [Some-State]:New York
Locality Name (eg, city) []:New York City
Organization Name (eg, company) [Internet Widgits Pty Ltd]:Bouncy Castles, Inc.
Organizational Unit Name (eg, section) []:Ministry of Water Slides
Common Name (e.g. server FQDN or YOUR name) []:your_domain.com
Email Address []:admin@your_domain.com

Sample Server Code, Magic Sauce is the following 4 lines:

listen 443 ssl;
server_name localhost;
ssl_certificate /etc/nginx/ssl/nginx.crt;
ssl_certificate_key /etc/nginx/ssl/nginx.key;

server {
listen 80 default_server;
listen [::]:80 default_server ipv6only=on;

listen 443 ssl;

root /usr/share/nginx/html;
index index.html index.htm;

server_name your_domain.com;
ssl_certificate /etc/nginx/ssl/nginx.crt;
ssl_certificate_key /etc/nginx/ssl/nginx.key;

location / {
try_files $uri $uri/ =404;
}
}