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Permissions between systems sharing file resources. Can anyone ELI5?

So, I know permissions on a single stand alone system, but I've yet to truly figure out permissions on multiple systems say, sharing access to file resources.

**System 1 (NAS system)**

* userA - userid - 1000 - usergroup - 100 (users)
* userB - userid - 1001 - usergroup - 100 (users)
* nobody - userid - 99 - usergroup - 99/100 (nobody, users)

/arrayofdisks1/ (o/g= nobody:users)

**System 2 (user machine)**

* userA - userid - 1002 - usergroup - 1002 (userA)
* userB - userid - 1000 - usergroup - 1000/100 (userB,users)


NFS mount /mnt/arrayofdisks1/


So can anyone ELI5 when it comes to permissions across systems? Or have a good article/video that can do the same? Is it the name that matters, the number, how does this voodoo work?

https://redd.it/m78pp3
@r_linux
Can I change my kernel in vmware? I have a spin off of Ubuntu 16.04, and I want to upgrade the kernel and version of ubuntu. Is this possible in a virtual machine?

So I wanted to install this bizzar spin off of Ubuntu called "Mangaka", but that's beside the point. The original kernel is 4.4 however I want to upgrade that to the latest 5.11.6, is this possible to do on a Vm using Vmware? I would also want to upgrade the ubuntu version to 20.10.

Notes:

\- I'm using workstation 16.x

\- idk what to say anymore, I'm just trying to get more characters in because the moderators keep on removing this post cause i'm not writing enough in the post.

https://redd.it/m7eqp1
@r_linux
Please, try finding an alternative to your Windows application before trying Wine or PlayOnLinux.

I've seen so many people try Wine or PlayOnLinux while not caring about finding an alternative. It is MUCH better to find a good Linux alternative to your windows application since Wine seems to be "emulating" a virtual C drive instead of using Linux's file manager. Please try to find an alternative to your app before trying Wine. Sites like Alternativeto can help you a lot. If there are no alternatives for your app (which is extremely rare) or if you can't find an alternative that you like or works good THEN try Wine.

Example(s): Use Pinta instead of Paint.NET and use Notepadqq instead of Notepad++.

https://redd.it/m7f57x
@r_linux
Every Debian based distro boots to this
https://redd.it/m7gr41
@r_linux
Tooling for managing users, systems, and servers; circa 2021.

Once upon a time, we could use Webmin & whatever to manage our servers are workstations. Now? The firewall stuff barely works (especially the iptables vs FirewallD vs nftables situation). And SAMBA user management really doesn't work if you're using it for AD; it seems like stuff still harkens back to the SAMBA3 days (SAMBA4 came out close to 10 years ago). I also know that at least Zentyal & Webmin, are still Perl-based; when Python & Go have been dominating the tooling space the past 10 years (even with the Py2-3 transition). Even funnier regarding the Webmin-track, is that the default install still includes the use of Flash and Java applets; which I know I've read on here that many a Linux admin will still be dealing with for servers and older systems for the next 5-10 years easy.


Conversely? There are some interesting BSD appliances that can do a bunch of things involving user and network management via a web-UI + versions of software we regularly use for Linux. Windows is still around too; it even can run Linux. Can't easily get Google Cloud or other VPS systems to easily use non-Linux systems though.


These are my observations anyway. I'm sure others have some suggestions or feedback, in light of what we're supposed to be doing in 2021, vs 2001. Hope everyone's keeping safe & well.

https://redd.it/m7h60i
@r_linux
Kooha - A simple screen recorder now available

It can record microphone and speaker sounds and works on both X11 and Wayland. Kooha only uses fully open-source libraries such as GStreamer, but unfortunately, it doesn't support desktop environments other than GNOME. One of the development priorities right now is to support other DE such as KDE and Elementary.

Kooha - Flathub
AUR

You can follow the development on GitHub

https://redd.it/m7hwur
@r_linux
Formatting a new disk

I've just formatted and created a filesystem on a new disk using the Disks program in linux mint, however when its mounted it shows up as sda-there is no sda1 (or 2,3 etc) like there is with my other disks. is this ok? is there another step i need to do?

https://redd.it/m7j2ok
@r_linux
Shrink root Mount Point

Hi guys,

I have a redhat installed with two disks

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 100G 0 disk
sda1 8:1 0 1M 0 part
sda2 8:2 0 1G 0 part /boot
sda3 8:3 0 64G 0 part
vgrhel-lvroot 253:0 0 520G 0 lvm /
sdb 8:16 0 500G 0 disk
vgrhel-lvroot 253:0 0 520G 0 lvm /

I made a mistake and extended the root mount point with the sdb disk, is there anyway to shrink what was assigned from sdb without unmounting the root mount point or remove the disk space assigned completely?

https://redd.it/m7o80f
@r_linux
Alma, Rocky or Ubuntu for WHM?

WHM/cPanel has already announced support for AlmaLinux:
https://blog.cpanel.com/almalinux-and-full-cpanel-support/?utm\_campaign=almalinux&utm\_source=facebook,linkedin,twitter&utm\_medium=social&utm\_content=1616004479&fbclid=IwAR3eBgTNYtseulHjRTNivaubYlM6wBy3JRrgbj0XXREPADfZhOQZh0Bfk2M

WHM will also probably support RockyLinux, with Ubuntu LTS support coming soon.

Which OS will you choose for your WHM production servers? I'm tempted to go with Ubuntu because it allows upgrades between versions, so it will be easier to keeps servers up to date without having to reinstall and migrate.

https://redd.it/m7orwd
@r_linux
Wallpaper changer with live weather + moon phases + timing based on sun location
https://redd.it/m7qsv2
@r_linux