Weekly Questions and Hardware Thread - August 14, 2019

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Ask your hardware requests here too or try r/linuxhardware!

https://redd.it/cq4jk0
@r_linux

Is mkdir ( or other commands ) system command or system call?

I am really confused between system commands and system calls. As I know system calls are provided by os API to be used in program as calling them as function. And system commands are core utils command in os. As mkdir know as system call but there is mkdir command in shell that clearly shows that it's command.

https://redd.it/cq5smc
@r_linux

[zsh] - Why pressing Arrow Up key only produces one history command?

I am using zsh( the oh-my-zsh version) on my MacBook Pro, everything is okay, however, every time I try to get the history of previous commands using the arrow up key, it'd only give me the previous one, no matter how I hard I press the key ;-(, it won't give me more history. Also, the history command only print "history" itself...

Anyone knows what's going on?

https://redd.it/cq64aw
@r_linux

The sad state of font rendering on Linux
https://pandasauce.org/post/linux-fonts/

https://redd.it/cq5qiq
@r_linux

ZoL easy to use distribution

Is any of you using ZFS on Linux as a daily driver?. If so, have you found any distribution that supports it in an kind of easy to mantain manner with kernel upgrades?.

My understanding is that at the moment is not as stable and tested as it should be for any distro to choose it as main FS, but I guess some might be do it easier than others to get it running or have a base install with it.

I saw that Manjaro architect has added initial support for it, asked yesterday on the Manjaro subreddit but didn't got any input :(.

If any of you is using ZoL, how has been the experience so far?.

https://redd.it/cq7cr4
@r_linux

A step-by-step tutorial for live audio streaming with Roc
https://gavv.github.io/articles/roc-tutorial/

https://redd.it/cq7pye
@r_linux

This interrupted my movie watching session on the plane - It looks like everyone else has that screen too. Anyone know what this is?
https://redd.it/cq88v2
@r_linux

My home lab server with 20 cores / 40 threads and 128 GB memory
https://louwrentius.com/my-home-lab-server-with-20-cores-40-threads-and-128-gb-memory.html

https://redd.it/cq9fos
@r_linux

Building a Home Server
https://chollinger.com/blog/2019/04/building-a-home-server/

https://redd.it/cq9few
@r_linux

PSA: You can use Vim keys on DuckDuckGo!

when the cusor is not focused on the search bar, you simply use \`j\` to move the selection of the result down, \`k\` to go up and \`l\` to follow the link it was focused on.

I accidently discorved this when I currently have the habbits of using \`hjkl\` of moving my cursor

https://redd.it/cqaozk
@r_linux

Flycast: Open-source Dreamcast emulation no longer requires a BIOS
https://www.libretro.com/index.php/flycast-progress-report-hle-bios-no-longer-requires-external-bios/

https://redd.it/cqbu6k
@r_linux

Be Warned. This page is a lie. YouTube TV is not supported on Linux.
https://redd.it/cqbnrn
@r_linux

Patch workflow with mutt - 2019
http://kroah.com/log/blog/2019/08/14/patch-workflow-with-mutt-2019/

https://redd.it/cqckuy
@r_linux

GitHub - trimstray/test-your-sysadmin-skills: A collection of *nix Sysadmin Test Questions and Answers. Test your knowledge and skills in different fields with these Q/A.
https://github.com/trimstray/test-your-sysadmin-skills

https://redd.it/cqcngf
@r_linux

[Instructions] Alpine Linux on Kindle Paperwhite with Chromium

Hi,

a while ago I posted on /r/unixporn about how full blown Alpine Linux runs on a Kindle Paperwhite 3. There have been attempts with Debian, but now for the first time there is up-to-date software compatible with the old kernel, useful tools like the onboard onscreen keyboard, and most importantly a proper browser that just works!

Here are some images: [https://imgur.com/gallery/uX1DENC](https://imgur.com/gallery/uX1DENC)

A small video how scrolling through a webpage looks: [https://imgur.com/gallery/F88pKNU](https://imgur.com/gallery/F88pKNU)

A few people stated their interest in how to set it up, so I wrote down tools+instructions to do so: [**https://github.com/schuhumi/alpine\_kindle**](https://github.com/schuhumi/alpine_kindle)

If you have a jailbroken Kindle already, it's really not that hard to set up, the provided image file has a sensible XFCE setup already. Also you don't lose your Kindle's ability to buy and read ebooks, this runs like an "application", all you lose is 2GB storage space (also not permanently, you can easily remove Alpine again). I only tested it on a Paperwhite 3, but it should work on others as well.

There have been a number of threads about linux on epaper devices, and this is probably the best experience possible right now I guess (without building your own device). So have fun with it!

Also the unixporn thread for anyone interested: [https://www.reddit.com/r/unixporn/comments/cll9zv/kinde\_paperwhite\_3\_alpine\_linux\_xfce\_chromium/](https://www.reddit.com/r/unixporn/comments/cll9zv/kinde_paperwhite_3_alpine_linux_xfce_chromium/)

​

^(Mentioning a few people who wanted instructions:) /u/agucova /u/Amanoo /u/sazafrass /u/benclark06 /u/JuliusFreezer2016 /u/vim_vs_emacs

https://redd.it/cqeuy0
@r_linux

FLOSS Timeline (1980 -2000)
https://redd.it/cqf3hf
@r_linux

Linux and Cloud Computing: Can Pigs Fly? Linux now Dominates Microsoft Azure Servers
http://formtek.com/blog/linux-and-cloud-computing-can-pigs-fly-linux-now-dominates-microsoft-azure-servers/

https://redd.it/cqc3xr
@r_linux

Announcing EPEL-8.0 Release
https://lists.fedoraproject.org/archives/list/devel-announce@lists.fedoraproject.org/thread/HXFHAPXPG2FX4NHP2WDNE3J3JXE53LML/

https://redd.it/cqhm69
@r_linux

How is NVMe-oF doing? Part 3: StarWind NVMe-oF Initiator + Linux SPDK NVMe-oF Target
https://www.hyper-v.io/nvme-part-3-starwind-nvme-initiator-linux-spdk-nvme-target/

https://redd.it/cqb35i
@r_linux

Mir 1.4.0 Release
https://discourse.ubuntu.com/t/mir-1-4-0-release/12198

https://redd.it/cqit8g
@r_linux

nftables: how to do connection rate limiting

I want to limit how many times per minute an IP can attempt to connect to my machine's SSH port. The examples provided at https://wiki.nftables.org/wiki-nftables/index.php/Meters don't work with my version of nftables 0.9.1 on kernel 5.2.7.

Specifically, it seems that in the map I need to put a literal colon (:) and then a value after it in the 'type' line when creating a map. I guess this specifies what the ipv4_addr and inet_service are supposed to map _to_.

How does one actually do this? I want to do more or less exactly what the wiki shows.

Also, random nftables gripe, why is it called ipv4_addr and inet_service in the map, but called 'ip saddr' and 'tcp dport' in the rule?

https://redd.it/cqmpme
@r_linux