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by jahboater
Mon Jan 20, 2020 5:12 pm
Forum: Off topic discussion
Topic: For mahjongg Moderator , On his remark on my post
Replies: 22
Views: 1373

Re: For mahjongg Moderator , On his remark on my post

When personal messages were still possible I would have send you one, but that is currently impossible, so the only "private" way to send you a short message is to give you a short (30 minutes) ban Would it be possible to re-enable the PM system, but somehow lock it down so users can only communica...
by jahboater
Sun Jan 19, 2020 3:57 am
Forum: Raspbian
Topic: Move Directory?
Replies: 28
Views: 1136

Re: Move Directory?

argv[0] is not an argument.
So it is five arguments.
As far as the shell is concerned.
by jahboater
Sat Jan 18, 2020 11:52 pm
Forum: Networking and servers
Topic: Updating Pis
Replies: 9
Views: 504

Re: Updating Pis

It does not 'yes' to blocking info screens*, which has happened a lot with some of the updates. I think its when a config file has been altered by the user. At least that's how it works for me. Though I use apt not apt-get more often now, unless I have to use apt-get. So do I, apt is much nicer. Bu...
by jahboater
Sat Jan 18, 2020 6:17 pm
Forum: Networking and servers
Topic: Updating Pis
Replies: 9
Views: 504

Re: Updating Pis

bensimmo, Great in theory, let down by some updates giving you information and waiting on your input. (At which point I think you need the unattended thing posted ?) That's why I gave the -y option. ssh pi@host1 'sudo apt-get update && sudo apt-get upgrade -y' The man page says: -y, --yes, --assume-...
by jahboater
Sat Jan 18, 2020 5:37 pm
Forum: General discussion
Topic: How bad/good is cooling on the Raspberry pi 4?
Replies: 47
Views: 2280

Re: How bad/good is cooling on the Raspberry pi 4?

rin67630 wrote:
Sat Jan 18, 2020 4:30 pm
None of the chips on a pi has got a casing optimized for thermal transfer.
Is that true for the 3B+ and the Pi4 with their metal lids and bonding to the copper PCB ground plane?
by jahboater
Sat Jan 18, 2020 3:16 pm
Forum: General discussion
Topic: How bad/good is cooling on the Raspberry pi 4?
Replies: 47
Views: 2280

Re: How bad/good is cooling on the Raspberry pi 4?

LTolledo wrote:
Sat Jan 18, 2020 12:38 pm
did you saw my earlier post here on what I did with that "gap", you'll see an easier hint there....
You mean the copper spacer?
As long as its dead flat and smooth, its probably very effective.
I just have this gut feeling that two interfaces are not as good as one :(
by jahboater
Sat Jan 18, 2020 11:04 am
Forum: General discussion
Topic: How bad/good is cooling on the Raspberry pi 4?
Replies: 47
Views: 2280

Re: How bad/good is cooling on the Raspberry pi 4?

Personally I use thermal pads on the bottom of the board as well. It pushes the CPU closer to the heat sink. That sounds like a good idea. I wondered about grinding the mounting posts (where the bolts go through) a little to close the gap. Maybe some grinding paste on a sheet of glass would cut dow...
by jahboater
Sat Jan 18, 2020 8:23 am
Forum: General discussion
Topic: How bad/good is cooling on the Raspberry pi 4?
Replies: 47
Views: 2280

Re: How bad/good is cooling on the Raspberry pi 4?

The trouble with that case is the large gap between the top of the SoC and the heat sink pad.
Did you use a shim or what?
by jahboater
Fri Jan 17, 2020 11:33 pm
Forum: Beginners
Topic: Unable to connect from Mac to Raspberry Pi4 using SSH
Replies: 7
Views: 293

Re: Unable to connect from Mac to Raspberry Pi4 using SSH

Ok here is the commands I used: Last login: Fri Jan 17 08:26:29 on console MacBook-Pro:~ <user>$ ssh pi@ 192.168.0.9 The authenticity of host ' (::1)' can't be established. ECDSA key fingerprint is SHA256:UMZTaUCnRDYqFjkHnjIqeI3yaV7U4xZi98bV19vBvno. Are you sure you want to continue connecting (yes...
by jahboater
Fri Jan 17, 2020 6:53 pm
Forum: Beginners
Topic: Unable to connect from Mac to Raspberry Pi4 using SSH
Replies: 7
Views: 293

Re: Unable to connect from Mac to Raspberry Pi4 using SSH

Are you certain that you have connected to the right host???
by jahboater
Fri Jan 17, 2020 6:25 pm
Forum: Beginners
Topic: Unable to connect from Mac to Raspberry Pi4 using SSH
Replies: 7
Views: 293

Re: Unable to connect from Mac to Raspberry Pi4 using SSH

drgeoff wrote:
Fri Jan 17, 2020 6:13 pm
Is this another case of not being aware that Linux does not echo the password characters? Not even asterisks. Just press the keys on the keyboard and finish with the Enter/Retun key.
and make sure CapsLock is not set - its case sensitive!
by jahboater
Fri Jan 17, 2020 4:41 pm
Forum: Networking and servers
Topic: Updating Pis
Replies: 9
Views: 504

Re: Updating Pis

:geek: Hi guys, I have been using raspberry pis for a while but new to the forum. I was wondering if such a thing exists, I currently have 50+ rpis deployed at different sites, all they run is a chrome page in kiosk mode mainly. I would like to keep them all up to date etc without having to manuall...
by jahboater
Fri Jan 17, 2020 3:15 pm
Forum: Troubleshooting
Topic: Getting Permission to Edit Config.txt
Replies: 10
Views: 358

Re: Getting Permission to Edit Config.txt

GlowInTheDark wrote:
Fri Jan 17, 2020 1:24 pm
Or he just caught one of the mods on a bad day.
The forum rules are simple:
https://www.raspberrypi.org/forums/view ... 63&t=15137
A simple, unintentional, mistake by a new user is not reason for a ban.
Must be something else.
Back to topic, or I'll get banned :)
by jahboater
Fri Jan 17, 2020 2:41 pm
Forum: General discussion
Topic: How bad/good is cooling on the Raspberry pi 4?
Replies: 47
Views: 2280

Re: How bad/gpod is cooling on the Raspberry pi 4?

So trying to get the pi4 down to 40c is a cooling pipe dream? Seriously, some of the stuff I have the poor beasty do runs for hours and fairly heavy loads, so I like 50c better. If you can lower the temps by under-volting or similar then that's a good thing and will save electricity and global warm...
by jahboater
Fri Jan 17, 2020 10:50 am
Forum: Networking and servers
Topic: Change the text of a file remotely
Replies: 12
Views: 474

Re: Change the text of a file remotely

Can you please explain a little more . i think the ssh way can only work if you're and the raspebrry pi connected to the same network. I'm not an expert but I would expect ssh (and scp) to work to any host that you can address (can ping) that has ssh enabled. There must not be a firewall blocking p...
by jahboater
Fri Jan 17, 2020 1:45 am
Forum: Raspbian
Topic: Move Directory?
Replies: 28
Views: 1136

Re: Move Directory?

Its actually nothing to do with Linux.
Any system that supports a command line, including Windows and MacOS, will be exactly the same.
by jahboater
Fri Jan 17, 2020 1:11 am
Forum: Troubleshooting
Topic: Getting Permission to Edit Config.txt
Replies: 10
Views: 358

Re: Getting Permission to Edit Config.txt

I've typed just Sudo into the command box and then tried opening the config file editing it and then saving but it still won't let me. I've also tried typing sudo boot/config.txt but it says command not found. It does the same thing when just typing just boot/config.txt. You need to use a text edit...
by jahboater
Thu Jan 16, 2020 6:02 pm
Forum: Networking and servers
Topic: Change the text of a file remotely
Replies: 12
Views: 474

Re: Change the text of a file remotely

You can execute remote commands with ssh. ssh pi@host 'command list' The commands may be anything, including in your case "sed", or a home written program to change the text. As usual separate multiple commands with ';'. ssh will ask for Pi's password, however that can be avoided simply enough (ssh-...
by jahboater
Thu Jan 16, 2020 5:53 pm
Forum: Raspbian
Topic: Move Directory?
Replies: 28
Views: 1136

Re: Move Directory?

After searching around the web for the error I found out there needs to be a space before the /var/www I inserted the space and it moved the directory and contents to /var/www The thing is, how does it know that "Downloads/foo/var/www" is in fact two directories??? Looks just like one long path to ...
by jahboater
Thu Jan 16, 2020 4:39 pm
Forum: General discussion
Topic: How bad/good is cooling on the Raspberry pi 4?
Replies: 47
Views: 2280

Re: How bad/good is cooling on the Raspberry pi 4?

those sticky "thermal tapes" IMO are no good, thus I usually call those as stick "insulator tapes", and, depending on the orientation of the RPi, those have tendency to "move" by themselves..... moving with it the heatsink placed on top of it I agree its not ideal, but "proper" 3M blue thermal tape...
by jahboater
Thu Jan 16, 2020 12:13 pm
Forum: General discussion
Topic: How bad/good is cooling on the Raspberry pi 4?
Replies: 47
Views: 2280

Re: How bad/good is cooling on the Raspberry pi 4?

the best size for this type of heat sink on the RPi4B is 35 x 35 x 10, any wider than that you'll need a copper riser block in between the SoC and the big-bulky-heatsink Yes, interesting, thanks. I currently use a 30x30x10 with 3M sticky thermal tape. I guess its all moot with the latest DVFS firmw...
by jahboater
Thu Jan 16, 2020 12:05 pm
Forum: Beginners
Topic: Newbie, nothing on screen (with no OS on card)
Replies: 5
Views: 237

Re: Newbie

Download Raspbian from here:
https://www.raspberrypi.org/downloads/raspbian/
and follow the instructions.
by jahboater
Thu Jan 16, 2020 10:32 am
Forum: General discussion
Topic: Future of raspberry pi - software related
Replies: 382
Views: 21781

Re: Future of raspberry pi - software related

Another wish-list software item might be a set of cross compilers for the Pi included as a standard package on the x86 version of Raspberry Pi desktop for personal computers. In line with this suggestion, if a standard GPIO library were supported, it would be nice to have a virtual GPIO emulation l...
by jahboater
Thu Jan 16, 2020 9:49 am
Forum: General discussion
Topic: How bad/good is cooling on the Raspberry pi 4?
Replies: 47
Views: 2280

Re: How bad/gpod is cooling on the Raspberry pi 4?

X-Gen wrote:
Thu Jan 16, 2020 1:36 am
Another thing you could do, is just use a regular passive heatsink, preferably a machined type, like the one in picture below, with multiple fingers
Image
Could you post a link to a supplier for these?
by jahboater
Thu Jan 16, 2020 9:44 am
Forum: General discussion
Topic: Pi stock availability??
Replies: 4
Views: 316

Re: Pi stock availability??

Where are you?
The Pi Hut (fast and reliable in my experience) have stock of the Pi4 2GB and 4GB.
https://thepihut.com/products/raspberry-pi-4-model-b

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