December 2020 - luv-main

Upgrading to Ubuntu 20.04 LTS - desktop or server?
by Andrew Greig 28 Dec '20

28 Dec '20

Hi All, I am very grateful for the assistance which has been given over the years by this list. I am looking for some advice regarding the OS version to use in an upgrade. I have an AMD system with an SSD 1Tb as my system drive, it is where I do my image processing under Darktable, and I have a pair of disks RAID 1, which is Data under BTRFS, and everything has been fantastic. Ed Chan has been significantly helpful with some scripts to automate my back ups and snapshots. I am looking to upgrade to Ubuntu 20.04 LTS, but should I load the Server version or will the Desktop version suffice? My activities include email, browsing, photo editing, watching the "University of YouTube", various social media. Many thanks Andrew Greig

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Re: debian: mozilla into cgroup limiting memory?
by Mark Trickett 27 Dec '20

27 Dec '20

> Hello Russell, and others, > > On 12/26/20, Russell Coker via luv-main <luv-main(a)luv.asn.au> wrote: >> On Saturday, 26 December 2020 6:17:27 PM AEDT Keith Bainbridge via >> luv-main >> >> wrote: >>> On 26/12/20 2:51 pm, Tim Connors via luv-main wrote: >>> > When I bought the laptop in 2014, I thought "32GB would be enough for >>> > *anyone*!". >>> >>> Isn't that what 'they' said when RAM was limited to 1MB >> >> 32G seems a lot for just web browsing. I have 100+ tabs open in Chrome >> and >> it >> runs fine in 8G. >> >> Software keeps getting bigger to fill all available space. I don't think >> that >> KDE now in 8G of RAM is doing anything for me that KDE didn't do for me >> in >> 96M >> in 1999. > > I still remember effective wordprocessing with well under a megabyte > of memory on the early PC's, whether IBM or quasi compatible. My first > efforts were on a DEC Rainbow, under CPM 86/80 with "WPS". There was > an equivalent package for the PDP8A running with something like 64 K > or RAM, and supporting two concurrent users, and the daisy wheel > printer, true letter quality printing. I can appreciate that the > current software "frameworks" or libraries make it relatively quick > and easy to put together larger software packages, and mostly enforce > good multithreading and memory overrun protection practices, but they > tend to produce significantly larger code and data memory footprints, > and sometimes quite slow execution. > > I prefer the way that open source does it, where it can be seen and > considered, rather than the closed source software where it becomes > necessary to just trust the competence of the programmers, and their > CVS practices. > > Regards, > > Mark Trickett >

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debian: mozilla into cgroup limiting memory?
by Tim Connors 26 Dec '20

26 Dec '20

`ulimit -v` doesn't work very well for multithreaded applications to limit their memory usage because it just spawns off more processes when it wants to hog more resources, and any limit I've found to stop it crashing my machine are unrealistically small per process and stops legit tabs from running. How, as an unprivledged user on debian, do I put mozilla into its own cgroup limiting its memory usage to ~ 50% of real memory (16GB ought be enough for 3 tabs these days, eh?). -- Tim Connors

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gphoto2 file size limitations
by Brian May 25 Dec '20

25 Dec '20

Am trying to transfer files using gphoto2 from my Canon camera over USB. gphoto2 says for one particular file: $ gphoto2 -L [...] #20 2Y4A1053.MP4 rd 0 KB video/mp4 [...] Where 0KB is is not correct. Besides the photo looks good on the camera. According to the camera the file size is 5.19GB. Does gphoto2 have limitations concerning maximum file size? Guessing there is a silent threshold at 4GB. A bit disconcerting when I think I have copied all my files, but it has actually copied size 0. With no errors or warnings. I have lost files that way. Particularly with the "file move" operation. Similar results when copying using nautilus file manager. This is on Debian/bullseye. Alternatively, is it possible this is a firmware bug on the camera? -- Brian May <brian(a)linuxpenguins.xyz> https://linuxpenguins.xyz/brian/

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Choosing an NBN RSP
by Tim Hamilton 16 Dec '20

16 Dec '20

Morning all, Looking for recommendations for an NBN RSP. We're in one of the last areas to be built out, and it's finally time to switch from ADSL to FTTN. We're only ~100M or so from the cabinet so I'm expecting a reasonable connection (as far as FTTN is 'reasonable'). So far I've narrowed the list to Aussie Broadband and Superloop, which look reasonably on par. Any recommendations, or other suggestions? I'll also need to do an equipment upgrade in the near future. Thinking of replacing our stopgap all-in-one device with Ubiquiti kit, e.g. an EdgeRouter, POE AP, switch. Anyone have experience with this? Is it overkill for a small home network? Cheers, Tim

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storage error
by Russell Coker 16 Dec '20

16 Dec '20

How likely is the following error (which happens periodically) to be on the M. 2 SATA device and how likely is it to be on the motherboard? If it's on the SATA device I can replace that, if it's the motherboard I just need to put up with periodic hangs and keep good backups (a new motherboard costs more than the value of the laptop). [315041.837612] ata1.00: status: { DRDY } [315041.837613] ata1.00: failed command: WRITE FPDMA QUEUED [315041.837616] ata1.00: cmd 61/20:48:28:1e:3e/00:00:00:00:00/40 tag 9 ncq dma 16384 out res 40/00:01:00:00:00/00:00:00:00:00/e0 Emask 0x4 (timeout) [315041.837617] ata1.00: status: { DRDY } [315041.837618] ata1.00: failed command: READ FPDMA QUEUED [315041.837621] ata1.00: cmd 60/08:50:e0:26:84/00:00:00:00:00/40 tag 10 ncq dma 4096 in res 40/00:01:00:00:00/00:00:00:00:00/e0 Emask 0x4 (timeout) [315041.837622] ata1.00: status: { DRDY } [315041.837625] ata1: hard resetting link [315042.151781] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300) [315042.163368] ata1.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded [315042.163370] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out [315042.163372] ata1.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out [315042.183332] ata1.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded [315042.183334] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out [315042.183336] ata1.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out [315042.193332] ata1.00: configured for UDMA/133 [315042.193789] sd 0:0:0:0: [sda] tag#10 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [315042.193791] sd 0:0:0:0: [sda] tag#10 Sense Key : Illegal Request [current] [315042.193793] sd 0:0:0:0: [sda] tag#10 Add. Sense: Unaligned write command [315042.193795] sd 0:0:0:0: [sda] tag#10 CDB: Read(10) 28 00 00 84 26 e0 00 00 08 00 [315042.193797] print_req_error: I/O error, dev sda, sector 8660704 [315042.193810] ata1: EH complete I'm getting the errors on a wide selection of somewhat random sectors (that are all divisible by 8). Dec 14 17:40:09 liv kernel: [297451.401459] print_req_error: I/O error, dev sdb, sector 2073200 Dec 14 17:40:29 liv kernel: [297471.674024] print_req_error: I/O error, dev sdb, sector 2931718768 Dec 14 17:40:29 liv kernel: [297471.674295] print_req_error: I/O error, dev sdb, sector 1226653088 Dec 14 17:40:29 liv kernel: [297471.674315] print_req_error: I/O error, dev sdb, sector 4156298656 Dec 14 22:33:20 liv kernel: [315042.193797] print_req_error: I/O error, dev sda, sector 8660704 Dec 11 17:42:23 liv kernel: [182970.726875] print_req_error: I/O error, dev sda, sector 42147264 Nov 30 22:43:31 liv kernel: [399074.746393] print_req_error: I/O error, dev sda, sector 231758600 Nov 26 00:55:16 liv kernel: [212647.753370] print_req_error: I/O error, dev sda, sector 23865952 Nov 26 00:55:16 liv kernel: [212647.753420] print_req_error: I/O error, dev sda, sector 23870056 Nov 26 00:55:16 liv kernel: [212647.753444] print_req_error: I/O error, dev sda, sector 5989744 Nov 26 00:55:16 liv kernel: [212647.753463] print_req_error: I/O error, dev sda, sector 6127336 Nov 26 00:55:16 liv kernel: [212647.753481] print_req_error: I/O error, dev sda, sector 8780056 Nov 26 00:55:16 liv kernel: [212647.753499] print_req_error: I/O error, dev sda, sector 9435856 Nov 26 00:55:16 liv kernel: [212647.753526] print_req_error: I/O error, dev sda, sector 9622096 Nov 26 00:55:16 liv kernel: [212647.753533] print_req_error: I/O error, dev sda, sector 9697912 Nov 26 00:55:16 liv kernel: [212647.753543] print_req_error: I/O error, dev sda, sector 9874752 Nov 26 00:55:16 liv kernel: [212647.753551] print_req_error: I/O error, dev sda, sector 9897224 Nov 27 01:35:55 liv kernel: [240255.929450] print_req_error: 22 callbacks suppressed Nov 27 01:35:55 liv kernel: [240255.929453] print_req_error: I/O error, dev sda, sector 43704312 Nov 27 01:35:55 liv kernel: [240255.929524] print_req_error: I/O error, dev sda, sector 43704432 Nov 27 01:35:55 liv kernel: [240255.929557] print_req_error: I/O error, dev sda, sector 3902144 Nov 27 01:35:55 liv kernel: [240255.929589] print_req_error: I/O error, dev sda, sector 26654472 Nov 27 01:35:55 liv kernel: [240255.929615] print_req_error: I/O error, dev sda, sector 35040632 Nov 27 01:35:55 liv kernel: [240255.929642] print_req_error: I/O error, dev sda, sector 38449048 Nov 27 01:35:55 liv kernel: [240255.929667] print_req_error: I/O error, dev sda, sector 44228320 Nov 27 01:35:55 liv kernel: [240255.929700] print_req_error: I/O error, dev sda, sector 43699720 Nov 27 01:35:55 liv kernel: [240255.929745] print_req_error: I/O error, dev sda, sector 43701688 Nov 27 01:35:55 liv kernel: [240255.929772] print_req_error: I/O error, dev sda, sector 43809896 Nov 28 14:37:09 liv kernel: [277047.828152] print_req_error: 20 callbacks suppressed Nov 28 14:37:09 liv kernel: [277047.828152] print_req_error: I/O error, dev sda, sector 55522392 -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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Kit, free to a good home
by Andrew Pam 15 Dec '20

15 Dec '20

LUV member Peter McMullen has a full-size rack and servers that he wishes to give away. No splitting - please take the whole lot: 1 IBM 24 unit server rack with glass front door and mesh rear door. Dimensions are (HWD) 1180x590x880 1 rack mounted keyboard with touchpad 2 Compaq 8 port KVM switches 1 24 port switch 3 IBM 330 servers (one only good for parts) 2 Compaq Prolient 360 Servers 1 Dell Poweredge 2550 1 IBM @Server - unknown model 1 2-unit empty case 1 4-unit generic case for ATX boards 1 APC UPS + assorted cable tidies etc. This kit is heavy, so you will need a trailer, a ute or a van to pick it up from Eltham. Contact: Peter McMullen ph: 0409 214 390 em: peter(a)mcmullen.net.au Cheers, Andrew -- mailto:andrew@sericyb.com.au Andrew Pam https://sericyb.com.au/ Manager, Serious Cybernetics https://glasswings.com.au/ Partner, Glass Wings

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Planet Linux Australia etc
by Russell Coker 12 Dec '20

12 Dec '20

https://planet.luv.asn.au/ Above is the current address of Planet Linux Australia. Hopefully the Linux Australia people will point the DNS entry for planet.linux.org.au to the LUV server so it can go back to the old name. Also I recently setup a Tor gateway node (that transports encrypted data between other nodes - doesn't talk to the clearnet or to clients) on the LUV server. The host OS of the VM has been running a Tor gateway node for a while and was running at 100% of a CPU core for most of the day, due to the design of Tor there is no possibility of using threading. Now we have 2 copies of Tor on the same hardware each using about 80% of a CPU core so that machine is giving 1.6 CPU cores of an i7-930 to the transfer of encrypted data. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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IPv4 email
by Russell Coker 10 Dec '20

10 Dec '20

For a few days the LUV mail server hadn't been accepting mail via IPv4. As my monitoring scripts were run from IPv6 connected systems and the mail server hosting my personal mail is on IPv6 I hadn't noticed it. Thanks Brian May for reporting this. I've fixed it and have started work on improving my monitoring scripts. I now have SSL certificates checked on all IP addresses (both IPv4 and IPv6) of the DNS names and I've uploaded a package to Debian/Unstable with that (not worth a regular release yet). The IMAP checks will be a little more complex and the basic SMTP checks should be easy enough. Hopefully by the end of the weekend all likely combinations of this sort of thing will be monitored and the source uploaded. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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[Brian May] IPv6 Linux question
by Brian May 10 Dec '20

10 Dec '20

I have posted this question here with some minor updates here: https://unix.stackexchange.com/questions/623274/ipv6-addresses-on-interface… -------------------- Start of forwarded message -------------------- From: Brian May <brian(a)linuxpenguins.xyz> To: luv-main(a)luv.asn.au Subject: IPv6 Linux question Date: Sat, 05 Dec 2020 15:06:24 +1100 >From a given computer, if I do the following: canidae# ip add dummy0 type dummy Command "dummy0" is unknown, try "ip address help". canidae# ip link add dummy0 type dummy canidae# ip addr add dev dummy0 2001:44b8:4112:8a02::55 canidae# ip addr add dev dummy0 192.168.2.55 canidae# ip link set dummy0 up Now from another computer on the network, I can ping 192.168.2.55. It does not matter that the packets are coming in on enp3s0, not dummy0 because the IP address is global. But I cannot ping 2001:44b8:4112:8a02::55 from a remote host unless I assign the address to enp3s0. My understanding is that this is suppose to work for IPv6 the same as IPv4, but it doesn't. This computer has no ip6tables that might be blocking something. This computer is: canidae# uname -a Linux canidae 5.9.0-3-amd64 #1 SMP Debian 5.9.9-1 (2020-11-19) x86_64 GNU/Linux But I have seen similar behaviour with: root@kube-node-3:~# uname -a Linux kube-node-3 4.19.0-12-amd64 #1 SMP Debian 4.19.152-1 (2020-10-18) x86_64 GNU/Linux How do I fix? -- Brian May <brian(a)linuxpenguins.xyz> https://linuxpenguins.xyz/brian/ -------------------- End of forwarded message -------------------- -- Brian May <brian(a)linuxpenguins.xyz> https://linuxpenguins.xyz/brian/

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