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by rpdom
Tue Aug 20, 2019 2:28 am
Forum: Raspbian
Topic: Why in 2017 do we still not have BTRFS in Raspbian?
Replies: 15
Views: 2496

Re: Why in 2017 do we still not have BTRFS in Raspbian?

rpdom, do you care about the integrity of your data? Yes, but I'm not paranoid about it to the extent that I will install a clunky filesystem that makes simple admin tasks complicated. I do regular backups. I do check my data. (I've had experience with many types of disk failure, including one that...
by rpdom
Mon Aug 19, 2019 8:47 pm
Forum: Raspbian
Topic: Why in 2017 do we still not have BTRFS in Raspbian?
Replies: 15
Views: 2496

Re: Why in 2017 do we still not have BTRFS in Raspbian?

Then let's somehow get support built into Raspbian, perhaps in this case it entails having to build it directly into the kernel, but seriously who cares? Pretty sure the smallest MicroSD card I can buy in a retail shop now is 16gb! I'd rather not have to replace half the cards on my systems just to...
by rpdom
Mon Aug 19, 2019 7:22 pm
Forum: General discussion
Topic: File transfer speed with the Pi4
Replies: 8
Views: 156

Re: File transfer speed with the Pi4

Right, so if copying from one device to the other, one would expect a total throughput of about half or 1294.44 Mbit per second. Not quite. It depends on the speed of the slowest device involved as well. Writing is slower than reading. Short burst writes will use the device's internal cache, so wil...
by rpdom
Mon Aug 19, 2019 7:18 pm
Forum: General discussion
Topic: rpi-bootloader updates for Aug 19?
Replies: 5
Views: 258

Re: rpi-bootloader updates for Aug 19?

I saw that a new kernel and new rpi-bootloader was recently made available. Is there a blog page that lists new features which have recently been enabled? I am wondering if usb boot has been enabled for RPi4b. There is a github repo that has details of the changes. As has been said many times, USB ...
by rpdom
Mon Aug 19, 2019 7:11 pm
Forum: General discussion
Topic: File transfer speed with the Pi4
Replies: 8
Views: 156

Re: File transfer speed with the Pi4

A maximum of 2Gb/s in theory, although it will likely be less than that.
by rpdom
Mon Aug 19, 2019 5:20 pm
Forum: Beginners
Topic: Localisation defaults
Replies: 3
Views: 66

Re: Localisation defaults

jbudd wrote:
Mon Aug 19, 2019 5:04 pm
Does that mean the Pi's default locale is US after all? That's depressing. ;)
Not in my experience. But I rarely use a desktop on a Pi.
by rpdom
Mon Aug 19, 2019 4:57 pm
Forum: Beginners
Topic: Localisation defaults
Replies: 3
Views: 66

Re: Localisation defaults

Your connection via SSH will use the keyboard layout of your local computer. It doesn't matter what the Pi is configured for. To configure the keyboard layout for the Pi when used with a locally attached keyboard you must configure it from that keyboard. Either using the desktop configuration menu o...
by rpdom
Mon Aug 19, 2019 12:00 pm
Forum: Beginners
Topic: A+ rating for ssllabs help with DHparams
Replies: 5
Views: 115

Re: A+ rating for ssllabs help with DHparams

That guide is a few years old. Some of the security aspects in it may be out of date now. I notice in the openssl manpage it says that the dhparam option has been superseded by genpkey and pkeyparam. However, I believe the "-out" option doesn't work with it, instead you should probably copy the bloc...
by rpdom
Mon Aug 19, 2019 5:59 am
Forum: Troubleshooting
Topic: Raspberry Zero WH chip is too hot and WIFI, bluetooth not working
Replies: 1
Views: 53

Re: Raspberry Zero WH chip is too hot and WIFI, bluetooth not working

If the chip is getting hot it means it has been terminally damaged. It is dying and will get worse.

Sorry, but it cannot be saved.
by rpdom
Sun Aug 18, 2019 5:03 pm
Forum: Beginners
Topic: Setting up second eth interface
Replies: 6
Views: 236

Re: Setting up second eth interface

You could create a bridge interface and link the two physical interfaces to it. The IP address would belong to the bridge and could be accessed via either interface.
by rpdom
Sun Aug 18, 2019 1:22 pm
Forum: Troubleshooting
Topic: Slow Ethernet Speed with RP 3
Replies: 2
Views: 31

Re: Slow Ethernet Speed with RP 3

Why is internet speed so slow to RaspberryPi? Is it? I don't have 1Gb internet, just (in theory) 100Mb down and 6Mb up. These are my results from speedtest on a Pi 4B with fully updated Raspbian Buster Lite. Retrieving speedtest.net configuration... Testing from [redacted] Retrieving speedtest.net ...
by rpdom
Sun Aug 18, 2019 1:02 pm
Forum: Troubleshooting
Topic: Permanently disable swap on Raspbian Buster
Replies: 52
Views: 1515

Re: Permanently disable swap on Raspbian Buster

Like this ... https://www.redhat.com/en/blog/do-we-really-need-swap-modern-systems PeterO Interesting the the "recommended" amount of swap nowadays is 20% of RAM size. Back in the "stone age" of Unix it was about 120% of RAM size. But RAM was slow and disks were still slower, but the systems I star...
by rpdom
Sun Aug 18, 2019 12:22 pm
Forum: Troubleshooting
Topic: Any workaround for USB HUB STT?
Replies: 9
Views: 207

Re: Any workaround for USB HUB STT?

I wasn't aware that the 4B doesn't suffer from this limitation. Good to know but can you provide a supporting link please. https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=243372&start=225#p1484595 32 devices (not endpoints now) maximum on the new USB, plus 6 on the old one on the USB C conn...
by rpdom
Sun Aug 18, 2019 12:12 pm
Forum: Troubleshooting
Topic: apt update issues
Replies: 4
Views: 102

Re: apt update issues

But the thing is they don't have the same names. Yes, they are all "Packages.xz" and they are all from the same "http:////raspbian.raspberrypi.org/" server, but the path names of each file are different. If your proxy/cache is considering them to be the same it has a serious bug in it. This shows th...
by rpdom
Sun Aug 18, 2019 9:11 am
Forum: Troubleshooting
Topic: Pi 4, rootfs on SSD goes readonly
Replies: 11
Views: 439

Re: Pi 4, rootfs on SSD goes readonly

There was a thread recently that had a link to a page that had some updated firmware for a JMicron USB3-SATA interface and an installer that works on a Pi 2 or above. I used it to upgrade my el-cheapo USB3.0-SATA adaptor and it stopped having the UAS errors that have been reported with some chipsets...
by rpdom
Sun Aug 18, 2019 9:06 am
Forum: Advanced users
Topic: Avoiding circular symlinks in an install script
Replies: 18
Views: 263

Re: Avoiding circular symlinks in an install script

Hard links do not “must”, point to the same inode as the original file, they do by nature. I don’t see that should be a problem. Perhaps you meant to say the files are not on the same device, hence you cannot use hard links? No, they are not in the same inode. Well, of course different files are no...
by rpdom
Sun Aug 18, 2019 9:00 am
Forum: Troubleshooting
Topic: Permanently disable swap on Raspbian Buster
Replies: 52
Views: 1515

Re: Permanently disable swap on Raspbian Buster

Hmm, ok. Looks like I sit corrected. The figure for swappiness on the Pi seems to be the default of 60 now (cat /proc/sys/vm/swappiness). It used to be something like 1 to prevent swap to the SD card except in extreme cases.

Still, none of my Pi are swapping. Even the one with 256MB.
by rpdom
Sun Aug 18, 2019 8:44 am
Forum: Troubleshooting
Topic: RASPBERRY PI 4 GIGABIT PORT SPEED
Replies: 6
Views: 173

Re: RASPBERRY PI 4 GIGABIT PORT SPEED

Also, there apparently is a bug in the speedetest-cli in Buster that shows lower speeds than is available. There are later versions available through something called pip (wasn't that something on CP/M?) that fixed that bug.
by rpdom
Sun Aug 18, 2019 8:40 am
Forum: Advanced users
Topic: Avoiding circular symlinks in an install script
Replies: 18
Views: 263

Re: Avoiding circular symlinks in an install script

rin67630 wrote:
Sun Aug 18, 2019 5:03 am
rpdom wrote:
Sun Aug 18, 2019 4:52 am
Use a hard link instead of a symlink?
In the original program? Funny.
Why do you think the whole procedure was done that way?
Well, looking at that script I'd say it was because you need to learn more about writing scripts.
by rpdom
Sun Aug 18, 2019 8:36 am
Forum: Raspbian
Topic: Menu editor, how to make the terminal open full screen?
Replies: 11
Views: 484

Re: Menu editor, how to make the terminal open full screen?

Maybe lxterminal doesn't have a "fullscreen" options, but you can specify a geometry (columns and rows) that will fill your screen in the font you have defined.
by rpdom
Sun Aug 18, 2019 8:31 am
Forum: General discussion
Topic: No internal cpu temp or voltage sensor on Pi 4?
Replies: 5
Views: 284

Re: No internal cpu temp or voltage sensor on Pi 4?

There is a basic power supply voltage monitor, but it only says if the voltage is high enough or not. It can be accessed through some of the flags on vcgencmd get_throttled.

One of the chip internal voltages can be measured with vcgencmd measure_volts
by rpdom
Sun Aug 18, 2019 8:21 am
Forum: Troubleshooting
Topic: apt update issues
Replies: 4
Views: 102

Re: apt update issues

Packages appears to gone from 13MB to 18.3MB and then to 69MB. Are there 3 sets of Packages? No, there are five sets of packages files in your set up. But two of them haven't changed since last time you did an apt update, so they didn't need to be downloaded again "Ign:" For this line in your sourc...
by rpdom
Sun Aug 18, 2019 4:52 am
Forum: Advanced users
Topic: Avoiding circular symlinks in an install script
Replies: 18
Views: 263

Re: Avoiding circular symlinks in an install script

Use a hard link instead of a symlink?
by rpdom
Sun Aug 18, 2019 3:27 am
Forum: Troubleshooting
Topic: Any workaround for USB HUB STT?
Replies: 9
Views: 207

Re: Any workaround for USB HUB STT?

What is the rating of the power supply for the hub? As thagrol said, most 7-port USB hubs contain two 4-port USB hub chips with the last port of the first chip linked to the upstream port of the second chip, and there is a limit on the number of USB endpoints (logical devices) that can be connected ...
by rpdom
Sat Aug 17, 2019 10:05 pm
Forum: General discussion
Topic: Lightweight word processor (alternative to LibreOffice Writer)?
Replies: 25
Views: 630

Re: Lightweight word processor (alternative to LibreOffice Writer)?

W. H. Heydt wrote:
Sat Aug 17, 2019 8:38 pm
One of the first things I do on a new Raspbian image is to add "export EDITOR=/usr/bin/vi" to the end of /etc/profile.
I do

Code: Select all

sudo update-alternatives --set editor /usr/bin/vim.tiny

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