by ray | Apr 2, 2017 | Linux / Ubuntu
Both Linux and UNIX use the passwd command to change user password. The passwd is used to update a user’s authentication token (password) stored in shadow file. The passwd changes passwords for user and group accounts. A normal user may only change the password for...
by ray | Apr 2, 2017 | Linux / Ubuntu
You could use the “su” command. $ whoami user1 $ su – user2 Password: $ whoami user2 $ exit logout If you want to log in as root, there’s no need to specify username: $ whoami user1 $ su – Password: $ whoami root $ exit logout Generally,...
by ray | Apr 2, 2017 | Linux / Ubuntu
About chmod chmod is used to change the permissions of filesor directories. Overview On Linux and other Unix-like operating systems, there is a set of rules for each file which defines who can access that file, and how they can access it. These rules are called file...
by ray | Apr 2, 2017 | Chromebooks
It looks like the Chrome OS developers are sneaking updates for the Play Store into more Chromebooks. Likely added in the latest Beta Channel update, we are seeing multiple devices with Android App support in Beta via a quick little method that works easily. We’ve...
by ray | Apr 2, 2017 | Chromebooks
Put your Chromebook into “Developer Mode” and you’ll get full root access, including the ability to modify your Chromebook’s system files. This is often used to install a full Linux system with something like Crouton. Developer Mode has other uses, too. You don’t have...
by ray | Apr 2, 2017 | Android, Chromebooks
Android — and 1,000,000+ apps — on your Chromebook is awesome. But not every Chromebook is going to get updated to have Google Play and Android apps. And most of the ones that will are in a long testing process. We all hate waiting. And we all hate updates that break...
by ray | Apr 2, 2017 | Android, Chromebooks
Google’s Chrome OS includes a shell environment known as Chrome Shell, or “crosh” for short. Crosh includes several terminal commands that can be used on all Chromebooks, even if developer mode isn’t enabled. Crosh includes commands for connecting to SSH servers,...
by ray | Mar 15, 2017 | Mac OS X
Most useful way if you’re a network administrator, Server administrator or web developer. And you’re working with Mac OS X machine likely MacBook Pro, MacBook Air, iMac or Mac Mini. Furthermore each version of Mac OS X has different- different command to reset DNS...
by ray | Mar 15, 2017 | Linux / Ubuntu
It’s really very tough job for every System or Network administrator to monitor and debug Linux System Performance problems every day. After being a Linux Administrator for 5 years in IT industry, I came to know that how hard is to monitor and keep systems up and...
by ray | Mar 15, 2017 | Linux / Ubuntu
While you can install Linux on just about anything, old tablets are probably the cheapest way to do it. Case in point, Node put together a guide that repurposes a Nexus 7 tablet and converts it into a micro-sized laptop. The process here uses an old Nexus 8 tablet, a...
by ray | Mar 14, 2017 | Security
A week ago Friday, someone took down numerous popular websites in a massive distributed denial-of-service (DDoS) attack against the domain name provider Dyn. DDoS attacks are neither new nor sophisticated. The attacker sends a massive amount of traffic, causing the...
by ray | Mar 14, 2017 | Security
Just months after disclosing a breach that compromised the passwords for a half billion of its users, Yahoo now says a separate incident has jeopardized data from at least a billion more user accounts. The company also warned attackers have figured out a way to log...
by ray | Mar 14, 2017 | Raspberry Pi
Real VNC is an excellent, easy way to remotely connect to your Raspberry Pi from your home network, but it’s a little confusing for beginners. VNC Connect is a new version that simplifies the process and makes it easy to connect to your Raspberry Pi from outside your...
by ray | Mar 14, 2017 | Podcasts
Check out Libsyn.
by ray | Mar 14, 2017 | Wordpress
When you first install WordPress, you’re limited to one domain. WordPress Multisite lets you use multiple domains, with one single WordPress install. This means that when you login to your WordPress Dashboard, you can manage all your sites from one admin page. There...
by ray | Mar 14, 2017 | HTML / Web
Use GeoPeeker.
by ray | Mar 14, 2017 | Mac OS X
On the rare occasion that you go to put a Mac to sleep and, well, it won’t sleep, there’s an easy to way to find out what the holdup is. Though this is a somewhat technical approach, it should give a good starting point to anyone who’s confused as to why something...
by ray | Mar 14, 2017 | DigitalOcean
Introduction DigitalOcean’s Block Storage allows you to create and attach additional storage volumes to your DigitalOcean Droplets. Volumes are an independent resource that can easily be moved from one Droplet to another within the same datacenter. Attached...
by ray | Mar 14, 2017 | Mac OS X
From a terminal, type the following commands: sudo apt-get update sudo apt-get install firmware-b43-installer Then, reboot and you should be good to go.
by ray | Mar 8, 2017 | Linux / Ubuntu
sudo apt-get install ddclient sudo nano /etc/ddclient.conf ## OpenDNS.com account-configuration ## use=web, web=myip.dnsomatic.com ssl=yes server=updates.opendns.com protocol=dyndns2 login=opendns_username password=opendns_password opendns_network_label Now, just to...
by ray | Feb 27, 2017 | Linux / Ubuntu
Connect to Amazon EC2 file directory using FileZilla and SFTP, Video Tutorial Summary of above video tutorial: Edit (Preferences) > Settings > Connection > SFTP, Click “Add key file” Browse to the location of your .pem file and select it. A message box...
by ray | Feb 27, 2017 | Linux / Ubuntu
Remove the cached key for 192.168.1.123 on the local machine: ssh-keygen -R 192.168.1.123
by ray | Feb 27, 2017 | Linux / Ubuntu
touch /path/to/file for an empty file
by ray | Feb 27, 2017 | Linux / Ubuntu
Introduction Let’s Encrypt is a new Certificate Authority (CA) that provides an easy way to obtain and install free TLS/SSL certificates, thereby enabling encrypted HTTPS on web servers. It simplifies the process by providing a software client, certbot, that...
by ray | Feb 27, 2017 | Linux / Ubuntu
Servers can automatically perform tasks that you would otherwise have to perform yourself, such as running scripts. On Linux servers, the cron utility is the preferred way to automate the running of scripts. For an introduction to Cron check-out our KB: How To:...
