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by jahboater
Mon Mar 02, 2020 4:32 pm
Forum: General discussion
Topic: Multiples
Replies: 4
Views: 372

Re: Multiples

Perhaps its running multiple threads?
by jahboater
Mon Mar 02, 2020 2:39 pm
Forum: General discussion
Topic: FTP Script , Help required.
Replies: 7
Views: 265

Re: FTP Script , Help required.

Just to be clear, since rsync runs over SSH these days it is also possible to use keys with it too. As with scp or sftp, prepare a key pair: ssh-keygen -t ed25529 -f ~/.ssh/x10host_ed25519_key -C 'userx' ssh-copy-id -i ~/.ssh/x10host_ed25519_key [email protected].x10host.com That's interesting. Why is ed2...
by jahboater
Mon Mar 02, 2020 1:54 pm
Forum: General discussion
Topic: FTP Script , Help required.
Replies: 7
Views: 265

Re: FTP Script , Help required.

Does the script look right ? Does it make a difference if I have LFTP or FTP installed ? I have a feeling this script is for ftp only not lftp which may be my problem, I would not use ftp for this at all! While "sftp" might be an option, I would just use "scp". It is already installed for Raspbian ...
by jahboater
Sun Mar 01, 2020 2:40 pm
Forum: General discussion
Topic: Best pi4 overclock without overvolting?
Replies: 5
Views: 574

Re: Best pi4 overclock without overvolting?

Just wondering if anyone has tried to push the pi4 via overclocking without overvolting. Any success? Or perhaps just a moderate over volt. My thought is to improve speed without increasing the temps too much. Anyone have any overclock settings they've tried to use which balance heat/speed? For a l...
by jahboater
Sun Mar 01, 2020 12:32 pm
Forum: General discussion
Topic: How to get rid of extra partition on usb drive?
Replies: 21
Views: 680

Re: How to get rid of extra partition on usb drive?

Try gparted then.

If the extra partition is still there, then it may be required for alignment purposes ?
by jahboater
Sun Mar 01, 2020 1:47 am
Forum: General discussion
Topic: Overclock settings
Replies: 11
Views: 514

Re: Overclock settings

Giga_Pi wrote:
Thu Feb 27, 2020 12:52 pm
I might need to check temperature of CPU to make sure it's fine.
Run this for an hour or so:-

Code: Select all

wget https://raw.githubusercontent.com/ssvb/cpuburn-arm/master/cpuburn-a53.S
gcc -o cpuburn-a53 cpuburn-a53.S
./cpuburn-a53
by jahboater
Fri Feb 28, 2020 6:58 pm
Forum: General discussion
Topic: USB image writer
Replies: 156
Views: 8689

Re: USB image writer

Most modern devices use 1M internally. Yes, 1M is good as the default, so I will likely never alter the block size option. By the way, the fact that USBImager is "dependency free" and trivial to build is a really important feature in my opinion. Much less work for the RPF if it ever gets adopted as...
by jahboater
Fri Feb 28, 2020 6:41 pm
Forum: General discussion
Topic: USB image writer
Replies: 156
Views: 8689

Re: USB image writer

Besides, compression and decompression is computation heavy and needs to be fast. Aha, yes of course. (I had assumed it would have called library functions or even a separate program for the decompression, in which case your optimization choice would not matter). Furthermore, the application is a s...
by jahboater
Fri Feb 28, 2020 5:09 pm
Forum: General discussion
Topic: USB image writer
Replies: 156
Views: 8689

Re: USB image writer

Hi @bzt, I just built and tried usbimager for the first time (in fact the first GUI based imager - I have always been happy with dd/cp/unzip)! Worked perfectly for Raspbian Lite using my Linux Mint 18.3 PC. The image file was in /tmp - a tmpfs disk. It correctly offered only the USB mounted disks as...
by jahboater
Thu Feb 27, 2020 11:18 am
Forum: Advanced users
Topic: Optimizing boot time of Pi Zero W
Replies: 14
Views: 573

Re: Optimizing boot time of Pi Zero W

Where to put those commands? config.txt? Thanks for the replies. No, they are Linux commands and need to be run once only. Once a service is disabled, it will never start until you enable it by hand again. What is initial_turbo doing? It runs the processor's at full speed for the first N seconds. I...
by jahboater
Thu Feb 27, 2020 11:01 am
Forum: General discussion
Topic: Overclock settings
Replies: 11
Views: 514

Re: Overclock settings

Is this going to be enough? Should I think of a lower overclock? If so, does anyone have any examples? Do I need to buy new case (or would an ICE tower cooler be sufice?) Take it in slow steps. Start at say 1600Mhz. Keep increasing "arm_freq" and "over_voltage" in small steps until it will no longe...
by jahboater
Wed Feb 26, 2020 6:14 pm
Forum: Bare metal, Assembly language
Topic: a basic debugger/assembler for learning bare metal ARM ?
Replies: 8
Views: 595

Re: a basic debugger/assembler for learning bare metal ARM ?

Does gdb include a crude assembler, or is it required to have written and assembled a complete program separately before submitting the object to the debugger ? Having the possibility to input raw instructions, submit them for execution on the fly and even modify already assembled instructions in m...
by jahboater
Wed Feb 26, 2020 5:11 pm
Forum: Advanced users
Topic: Optimizing boot time of Pi Zero W
Replies: 14
Views: 573

Re: Optimizing boot time of Pi Zero W

PeterO wrote:
Wed Feb 26, 2020 4:57 pm
Without knowing what you what to use it for it's impossible to say which services are "non-needed".
He was asking "how" to disable the services, not "which ones" he should disable.

Something like:-

sudo systemctl stop xxx.service
sudo systemctl disable xxx.service
by jahboater
Wed Feb 26, 2020 5:07 pm
Forum: Advanced users
Topic: Optimizing boot time of Pi Zero W
Replies: 14
Views: 573

Re: Optimizing boot time of Pi Zero W

Jamescoop wrote:
Wed Feb 26, 2020 4:44 pm
How to optimize boot time?
You could start with "initial_turbo=30" in /boot/config.txt

Run these commands to see whats taking all the time:-

systemd-analyze
systemd-analyze blame
systemd-analyze critical-chain
by jahboater
Wed Feb 26, 2020 4:56 pm
Forum: Bare metal, Assembly language
Topic: a basic debugger/assembler for learning bare metal ARM ?
Replies: 8
Views: 595

Re: a basic debugger/assembler for learning bare metal ARM ?

Its gdb Some hints: The gdb command "layout reg" (or just "la r") splits the screen into three windows. The top window is all the registers with those last changed in inverse video (extremely use for watching code execute). The middle window is the assembler source lines (with the current line in in...
by jahboater
Wed Feb 26, 2020 10:01 am
Forum: General discussion
Topic: RPi 4 heat sink
Replies: 25
Views: 1481

Re: RPi 4 heat sink

would these heat sinks fit? it seem the heat sink would be bigger than the cpu surface foot print and would extend over components on the side. but that the cpu seem to have a lid that bump it a little higher, but if i place a 40 mm x 40 mm heat sink, would the components from the side prevent the ...
by jahboater
Wed Feb 26, 2020 9:44 am
Forum: General discussion
Topic: Pi4 1GB Availability? US Distributor Shows It As Discontinued
Replies: 27
Views: 1640

Re: Pi4 1GB Availability? US Distributor Shows It As Discontinued

Am still waiting for my local supplier to stock on these....as I think its perfect to replace the RPi4B-2G in my NAS setups. its available in amazon, but I dont like the posted price...... will wait for its availability .... my systems are running fine as it is anyway..... :D Perhaps the larger spa...
by jahboater
Wed Feb 26, 2020 8:54 am
Forum: General discussion
Topic: RPi 4 heat sink
Replies: 25
Views: 1481

Re: RPi 4 heat sink

by jahboater
Tue Feb 25, 2020 8:30 pm
Forum: Beginners
Topic: [Raspian] How to search for packages efficiently ?
Replies: 10
Views: 413

Re: [Raspian] How to search for packages efficiently ?

For installed packages, I do:-

dpkg -l | grep ...

otherwise:

apt-cache search ....

Edit: "apt search ..." suggested by @kerry_s above looks more helpful.
Try them all and see what you like!
by jahboater
Tue Feb 25, 2020 8:26 pm
Forum: Beginners
Topic: Internet speed of Pi 4 and speed test from command line
Replies: 6
Views: 378

Re: Internet speed of Pi 4 and speed test from command line

What do you mean by the "internet speed"? You can easily measure the speed of the Pi's ethernet and Wifi on the local network with the "iperf" command. To install it:- sudo apt update sudo apt install iperf You will need to install it also on another computer on the network, preferable a fast PC wit...
by jahboater
Tue Feb 25, 2020 2:36 pm
Forum: Advanced users
Topic: minimum voltage (arm) ?
Replies: 2
Views: 180

Re: minimum voltage (arm) ?

Just curious, the base arm voltage is (reported as) 0.80125 without special over_voltage set. Is this the nominal (or close) volts specified for the Pi4 SoC ? Is this base voltage also a hard minimum, or else will the Arm tolerate some amount of under_voltage (aka "negative" over_voltage), and if i...
by jahboater
Tue Feb 25, 2020 2:32 pm
Forum: Beginners
Topic: Logitech MX Keys keyboard and MX 2S mouse with Pi 4B? Any advantages in getting the Desktop Kit?
Replies: 7
Views: 631

Re: Logitech MX Keys keyboard and MX 2S mouse with Pi 4B? Any advantages in getting the Desktop Kit?

Thanks. Speaking of the power button, is it more convenience if I have it? I'd wait until you have used the Pi for a bit. My Pi's are very rarely powered off - only when I need to do something physical (such as replacing the SD card). If you want to work with the GPIO, or fiddle with heatsinks/fans...
by jahboater
Mon Feb 24, 2020 11:32 pm
Forum: Beginners
Topic: Heatsink placement on 3B+
Replies: 15
Views: 521

Re: Heatsink placement on 3B+

I also agree with jahboater that simple vertical mounting is a great solution. I made a quick and dirty mount out of popsicle sticks as a temporary fix but ended up doing it for most of my home Pi setups. For a few friends and family members too. Look at this simple mount on the cover of the MagPi ...
by jahboater
Mon Feb 24, 2020 3:27 pm
Forum: Beginners
Topic: Running console command at startup
Replies: 21
Views: 696

Re: Running console command at startup

Where is "prowl_key.txt" ?
Perhaps you should supply the full path.

Also, does "prowl.pl" have a shebang line?
And does it have execute permission ?

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