Series 2 - listen to the podcast
Exciting news, series 2 has just begun. We're bigger, we're better, we've taken on your feedback, we're more together (I guess that's a matter of opinion).
All the episodes from series 1 are available on the sidebar.
The Binary Times - Series 2 Episode 3
00:25 Intro to Series 2 Episode 3 begins with a chat about the meteor shower last night.Clear skies made for some great viewing and possibly good pictures.
01:42 Mark begins his linux escapades for the last two weeks by telling us that his ubuntu phone crashed. He took this opportunity to reflash his phone with the ubports image. Wayne points out that necessity is often the mother of all getting things done that you need to do. Deadlines work!
06:30 Mark tells us that he's been working on the Series 1 binary times CD. He took the advice of Wayne and some of the guys at a music meetup in Mallow to come up with the final result, which will be available to buy or as a perk for our patrons over on patreon. The CD sleeve and CD label were produced with LibreOffice Draw and the CDs produced using Brasero or K3b.
08:35 Wayne has been keeping an eye on the omgubuntu website, run by Joey Sneddon, and came across an article on the release of 16.04.3. He noticed that on one of the machines he upgraded the fans are running quite a bit more and there were some display issues with multiple screens. Unfortunately he discovered these issues after autoremoving the previous kernels... Wayne is looking for some advice on going back to an earlier kernel. Wayne and Mark bemoan fan noise.
16:36 Wayne goes on to tell us about another omgubuntu article, and that is Ubuntu Mate 17.10 alpha 2 has been released. Mark really wants to install Mutiny, Wayne tells us how. Wayne is chuffed that he's influenced Mark to use Mate. He goes onto clarify that in the last episode he was talking about synapse and not snaps. The guys struggle to think of a simple subject.
31:35 Wayne turned on the Rod of Doom! Mark wants to do that project.
32:56 Mark begins Under the hood with ! commands:
!* - Execute the command with the arguments passed to the previous command.
!^ - Execute the command with the first argument of the last executed command.
!$ - Execute the command with the last argument of the last executed command.
!?keyword?! - Executes a command from the Bash history for the first pattern match of the specified keyword.
The guys discuss the dangers of the last command and how using ! seems to be frowned upon anyway, so use with caution! Both agree sudo !! is quite a useful command when used with respect.
36:15 Wayne talks about wget and how useful it is.
wget --recursive --no-clobber --page-requisites --html-extension --convert-links --restrict-file-names=windows --domains website.org --no-parent www.website.org/tutorials/html/
--recursive - download the entire Web site.
--domains website.org - don't follow links outside website.org.
--no-parent - don't follow links outside the directory tutorials/html/.
--page-requisites - get all the elements that compose the page (images, CSS and so on).
--html-extension - save files with the .html extension.
--convert-links - convert links so that they work locally, off-line.
--restrict-file-names=windows - modify filenames so that they will work in Windows as well.
--no-clobber - don't overwrite any existing files (used in case the download is interrupted and resumed).
Wayne finishes with lshw commands:
lshw -c disk - detailed disk information
lshw -short - shortened version (quite useful)
lshw -sanitize - remove sensitive info such as UUIDs and IP addresses, serials etc...
43:25 Irish saying for the podcast - Tá mé go maith.
The Binary Times - Series 2 Episode 2
00:24 Intro to Series 2 Episode 2 finds Mark congratulating Wayne on a great start and our podcasters are living in dull and murky places. The guys really get into their weather!
01:45 Mark's installed Ubuntu Mate 17.04 64 bit on a 3GB RAM Core 2 Duo which didn't recognise True OS as a valid operating system and completed a course in Cisco Unified Communications Manager. He tells us that CUCM sits on top of a modified Red hat enterprise linux and that administration of the system is achieved through modifying options in webpages made by different factions in Cisco. He tells us of, in his opinion, the superiority of the MX-One and the ability to administer the system from the command line.
08:40 Wayne has been doing alot of modular sysnthesis, which can be described as using specialized software modules in various ways to modify or process a parameter of an audio signal such as, for example, the frequency or ampiltude. Wayne admits to using Ableton to achieve this, and this leads to a conversation on building things in Open Source and the difference between ideas people and doers and the concept of inspiration vs. perspiration.
14:49 Mark mentions that Sysadmin's day (28th July) was his last day at work til September as he is taking some work / life balance leave for himself to learn some Blender, Python, Kali, Squid Proxy server, read some books while also doing some cool stuff with the kids using Khanacademy. Maybe relax a bit too.
18:00 Wayne introduces our New Section, "So you've installed Ubuntu Mate, now what?" The guys talk about a few things that you do once you've installed Ubuntu Mate. The Welcome screen gets first mention, and how easy it makes Ubuntu Mate for new users to use. Getting started is the first place you would want to go to in the Welcoms screen, and the guys discuss the various options within. Mark mentions enabling DRM in firefox too (Menu / Preferences/Content/Play DRM content). Wayne goes on to say that you can start a terminal using CTRL-ALT-T and typing sudo apt update && sudo apt upgrade OR sudo apt dist-upgrade (the difference between the two can be found here). Wayne finishes the section with a discussion on synapse, when once installed is a handy utility invoked by hitting CTRL-SPACE which allows you to search for installed applications simply by typing the name. Synapse is one of the must have apps/packages for new Ubuntu Mate installations. To finally finish Mark mentions the software boutique and admires how it is laid out.
36:00 Mark goes on to tell us all that Ubuntu 16.10 is no longer supported, advises that a link will be available in the show notes on how to upgrade to 17.04 and introduces Under the Hood with the following command which will tell you the date when your system is no longer supported:
38:30 Wayne talks about two things for Under the Hood:
Using Grub 2 to change which OS is the default to boot into:
sudo cp /etc/default/grub /etc/default/grub.bak
sudo vim /etc/default/grub
GRUB_DEFAULT=0 (change this to entry you want to default boot ie 5 = sixth entry)
Second Under the hood, from Going Linux podcast, episode #327:
Mark follows up with another grub trick and that is to turn off the quiet splash in grub.
45:38 Irish saying of the podcast, An té nach bhfuil láidir, ní foláir dó bheith glic, or he who is not strong must be clever, a fitting Sysadmin Day's quote.
The Binary Times - Series 2 Episode 1
00:24 Intro to the first episode of our second season and the guys have decided to keep the weather thing going, despite its Bristol murkiness and Kilkishen dullness.
01:17 Mark's been busy during the long break between seasons with linuxy stuff and due to some user feedback has prepared some show notes (he still hasn't shaved yet)! He's glad to know that people are listening and enjoying and getting something out of the podcast as well.
02:16 Wayne tries to tell us that's he's not been up to much linuxy type stuff though we all know he's been hacking away as per usual! The guys discuss FOSS Talk Live and Ogg Camp and the implausibility of them attending.
03:38 What have we got for today's show? Mark would like to talk about the Ubuntu Hour held in Ennis, why we should be using Free Software and how to install Ubuntu Mate.It all sounds good to Wayne.
04:08 Mark talks about the Ubuntu hour held on Independence Day, 4th July, in the West County Hotel in Ennis. A good time was had by all. One of the things they managed to do while chatting was install Ubuntu Mate 32 bit edition. They discovered the first hurdle of changing OS and that was changing the boot order in BIOS.
11:28 Wayne jumps in before Mark carrys on into his next segment with some good points on his own experiences with Ubuntu Mate. He points out that Ubuntu Mate is good for new users and experienced users alike due to its versatility. The fact that people Wayne has helped migrate to using Ubuntu Mate haven't been asking loads of questions is seen by both as a good sign in the ease of use. Mark advises that another easy to use distro is Linux Mint.
14:47 In the first place, why use Free Software in the first place? Mark talks about the importance of Free Software to maintain your Freedom and Privacy and points to some links worth looking at. Wayne talks about his transistion to Free Software. Ableton have no future plans to port their software to Linux and a Free and Open Source license. The discussion continues around the benfits of Free Software and why people continue to not break bad old habits with proprietary software and formats.
25:11 With the benefits of Free Software done with, Wayne takes the opportunity to thank our first Patron on Patreon. Thank you kind gentleman for your patronage!
26:14 Wayne asked his partner for feedback on her Ubuntu Mate experience compared to Windows. Interesting feedback followed. The convenience debate continues. Wayne remains liberated and turning heads with the car he drives. Mark's car's cheating. To sum up: Use Free and Open Source Software!
34:14 Under the Hood. Wayne starts off with a beautiful one: Shift+Page up and Shift+Page Down to scroll up and down through terminal output. Mark digresses with dmeg -h producing human readable date and time output and telling us that he changed his main desktop to Kubuntu.
38:09 Wayne's second under the hood tackles the ip command and iproute2 networking utilities. He points out that netstat has been replaced with ss. Of note, netstat reads from /proc, the ss command gets information directly from kernel space, meaning ss can be faster and provides more info.
ss -a (all)
ss -t (tcp sockets) or ss -ta (all tcp sockets)
ss -u (udp)
ss -w (raw sockets)
ss -x (unix domain)
ss -d (dhcp)
ss -s (summary of socket info)
ss -p (process)
ss -t4, -t6 (see ipv4 or ipv6 sockets)
ss -t6a (see all ipv6 sockets)
ss state (established (show all established sockets)
ss -t state (tcp can be in many states, ie established, syn-sent, syn-recv, closed, close-wait, etc
ss -tan (translates port service name to a number ie 22 instead of ssh)
ss -lt (show listening tcp ports) or
If you see a *:5355 it shows that this port is listening on all interfaces on your system
If you see a 127.0.1.1:53 shows that this port is listening on 127.0.1.1
ss -ot (get timer information for tcp ports)
ss -t dst :443 (show all tcp socktets with a destination of 443)
ss -t src :22 (show all tcp sockets with a source port of 22)
ss -ti dst :443 (more information about tcp 443 destination socket)
42:17 Mark's simple but good one:
sudo apt install --install-recommends [package you want to install]
sudo apt install --install-recommends -f [package you want to install] forces the install of packages. Use with caution!
45:28 Wayne hands over the Irish saying to Mark who was in flying Irish form earlier, we quickly see he's kinda crashed and burned. We do get two sayings out of him because of this though:
Ní neart go cur le chéile - there's strength with friends ie. unity is strength
Níl saoi gan locht - there's not a wise man without a fault!
Many thanks to our patrons.
About The Binary Times
The Binary Times podcast is created by Mark and Wayne, who just like using linux and open source software and want to spread the word.
Linux is free and open source and it is an excellent choice of operating system for our ever changing times.
This podcast is released fortnightly.
Electronic fun with the Raspberry Pi
This show aspires to touch on various aspects of Linux, with chat, musings, information, commands to help you get started or to advance within the Linux environment.