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Questions tagged [embedded]

An embedded system is a computer system designed for specific control functions within a larger system.

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How can I the snmp agent on embedded linux

I want to implement the snmp-agent on the embedded linux. Could you recommend a good reference for me?(including a monitoring program on pc) Thanks
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1 vote
1 answer
72 views

Windows 7 Embedded VM in Azure

I have a really weird request. My employer has a product that only runs on Windows 7 embedded machines and now they want to have some test VMs in Azure. Now when I try to RDP into the machine it doesn'...
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2 answers
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How to stop specific site from using embed content from my site

I'm on nginx and I just found some sites using embedded content from my site without my consent. I have sites using my content that way and I would like to permit them but I need to stop some sites of ...
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Headless installation of debian "golden image"

For the retrofit of some older embedded (Intel, x86) PCs I would like to install a customized Debian image with as little as possible user interaction. Normally I would create a Debian installation, ...
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WtpDownload_linux: Usage, gathering the required files?

Edit: These tags were removed as they don't exist: ESPRESSObin U-Boot marvell A3700 I'm in over my head working on an ESPRESSObin. I flashed the wrong bootloader, because I thought the recovery was ...
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1 vote
1 answer
587 views

SSH cannot login with root pasword

I have a buildroot system that I cannot login into with via root. Root login using .ssh/authorized_keys working, but isn't practical since it's a read-only filesystem. Telnet root login also works. ...
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How to populate /dev/input?

I have a fully working (for this part) embedded system based on a rather ancient, vendor-modified, Linux v3.18.29. To solve other problems I am in the process of upgrading everything to current u-...
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  • 236
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1 answer
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How to manually setup network connection from Busybox shell (ash)?

An embedded device running Linux version 2.6.26.5, ARM Linux Kernel. Busybox v1.10.2 shell (ash), I'm in Busybox shell. I want to set up connection between embedded device and computer. Is it ...
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6 votes
3 answers
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Up-to-date distros supporting 32-bit i586/non-PAE, specifically for ALIX boards (AMD Geode) [closed]

I have several ALIX systems (powered by the AMD Geode LX processor without PAE support) that are still running on Ubuntu 12.04, the last Ubuntu-Release to supports non-PAE kernels (i.e. compiled for ...
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1 vote
1 answer
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Discovering embedded management tools

I have a list of 130 IP addresses that I need to find out if they are ilo or another remote management tool. Is there a way to script this. Can I use the test-netconnection command in powershell.
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Not able to connect to IBM Bluemix with TLS1.2 Security?

I am trying to connect a device to IBM Bluemix with TLS1.2 security with Quectel M95 GPRS Hardware. Can any one help why I am not able to open SSL connection. I am getting QSSLOPEN command response as ...
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1 answer
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Trace access to root filesystem: Process and filename

I run linux on eMMC. I want to reduce the IO which gets done on the device. I don't like to search the needle in the haystack. I want a way to trace the access to the device. I want to see the ...
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22 votes
6 answers
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How bad is it to have multiple devices with the same SSH server keys?

I am working on an embedded device that runs FreeBSD and SSH. As you know, sshd likes to randomly generate a set of server keys when it first boots up. The problem is that we will be shipping the ...
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1 answer
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How can I see what is the number of embedded objects used by a site in html from a wireshark trace?

I have recorded a wireshark trace and visited some websites. I exported the trace as a CSV file. How can I see the number of embedded objects in each of the sites I visited? Thanks.
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3 votes
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ESXi host loses connectivity to embedded USB storage

Referencing ewwhite's SF question/answer here: What happens when the USB key or SD card I've installed VMware ESXi on fails? I have a real simple question. We deal with this constantly and a ...
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6 votes
2 answers
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Embedded Linux – mechanism for deploying firmware updates?

I am considering developing on the Yocto project for an embedded Linux project (an industrial application) and I have a few questions for those with experience with embedded Linux in general -- Yocto ...
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Xorg in an embedded system--leaking memory?

I'm working on an embedded system that runs a custom Linux platform and it appears that the Xorg process is leaking memory. According to top, Xorg's virtual memory grows until the system crashes. ...
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12 votes
4 answers
3k views

How to lock out normal (non-admin) users during software installs?

We have a lot of thin clients running Windows Embedded Standard 7 and an SCCM 2012 R2 server to manage them. The thin clients have their write filters enabled (FBWF) so machine changes are not ...
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2 votes
1 answer
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SEPM embedded database stuck on "Starting"

I have recently upgraded SEPM (Symantec endpoint protection manager) from 12.1.4 to 12.1.5. Upgrade completed successfully however the 'Symantec Embedded database' service stuck on 'Starting' status. ...
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1 vote
2 answers
574 views

Using a configuration management tool to configure nodes without ssh

I'd like to manage the configuration of several devices running embedded Linux. There is a web server in my environment which has a SOAP interface I can use to get/set all the parameters of each of ...
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2 votes
1 answer
421 views

Qdisc pfifo_fast in linux and IP Precedence

Im using a embedded Linux distribution for a router system. My goal is to prioritize some traffic with minimum delay. I have a WAN interface with a default pfifo_fast qdisc attached to it. I have read ...
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1 answer
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Ssh without password to Embedded read only device

I want to be able to retrieve values from an embedded device every minute. Currently I have a script that does this over ssh but I have to type in the password for the embedded device every time I ...
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0 votes
1 answer
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Manipulating root files in images without being root?

In our environment we have linux developer PCs and several embedded boards. The embedded boards are booted from an image. Those image files should be created/modified on the developer PCs. Mounting is ...
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0 votes
1 answer
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Strange issue on netadapter lantronix matchport bgpro

I'm connected to a switch on a LAN, i've tested my matchport on others network and i've not accused this problem. On this istead i seen a lot of UP and DOWN of eht0 on startup. Someone know something ...
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0 votes
1 answer
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mysql with dom and sd cards loss data

I have a problem with a MySQL application that write on a SD card or a Compact Flash. After a data loss (a power failure, for example), if I try to retrieve the data of my db, it fails and the error ...
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0 votes
1 answer
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How should a HTTP server treat requests that specify a protocol higher than HTTP/1.1?

I have created a HTTPS server from scratch for use in an embedded application. At present it is able to distinguish between HTTP/1.0 and HTTP/1.1 when it receives a request, and it then subsequently ...
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2 votes
0 answers
530 views

Mounting main partition read-only and temporary folders as tmpfs

I have a small embedded board PC which uses flash card to boot and I'm running Ubuntu server 12.04. But since flash cards have limited lifetime I would like to mount it as read only and have only some ...
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0 votes
1 answer
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Could an ISP selectively block .png, .jpg, .js, .css and others from internal HTTP server?

This is a bit of a specialist question as it concerns a very small embedded web server as opposed to a conventional web server (e.g. Apache, IIS) and it's more to do with the routing through the ISP. ...
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6 votes
1 answer
6k views

`ssh -NfR` equivalent with dropbear

I want to open a reverse tunnel in background. When using OpenSSH ssh -NfR 9022:127.0.0.1:22 <target> always worked. When I did that with dropbear on my router, it failed like this: # ssh -NfR ...
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11 votes
2 answers
3k views

Making SD card corruption-proof

My embedded linux device uses an SD card for saving certain diagnostics data, far too copious for internal flash. The problem is if the device is switched off unexpectedly, the filesystem (FAT32) on ...
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1 vote
3 answers
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Compact Flash mounted Read Only

I have a board, running linux (RedHat, kernel: 2.4.32). The board has been up and running since long time. However suddenly, some errors are being observed in the logs, and the Compact Flash (present ...
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8 votes
1 answer
43k views

Cannot get Motorola MC3190 to associate with WiFi access point

Using the Wireless Fusion management tools for the Symbol / Motorola MC3190, we cannot get the handheld to associate to the WiFi access point. Using the Find WLANs feature in the Fusion software, we ...
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44 votes
4 answers
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OpenVPN performance: how many concurrent clients are possible?

I am evaluating a system for a client where many OpenVPN clients connect to a OpenVPN server. "Many" means 50000 - 1000000. Why do I do that? The clients are distributed embedded systems, each ...
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5 votes
1 answer
4k views

Client not getting address from some DHCP server

I'm working on some embedded devices which should be connected to a large network (hundreds of devices) via ethernet and that should be configured using the DHCP protocol. What I'm experiencing is ...
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2 votes
1 answer
168 views

44pin industrial flash ide on embeded debian freezes after an indefinite period of time [closed]

On an embedded system I have, using a 44 pin transcend industrial flash, after a while I will notice that I cannot read any files or write to the disk. I am using the 3.2.0.* BPO i686 SMP PAE kernel. ...
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8 votes
2 answers
3k views

Https for embedded devices, local addresses

I am trying to add https to the embedded devices I am working on. These devices are generally assigned local ip addresses and so cannot get their own ssl certificates. So essentially my question is ...
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4 votes
5 answers
2k views

Is there an official way to detect an existing DHCP server?

I'm planning a new feature on our product to support a LAN. Since the installation will be done by relatively non-technical people (it's for boats) I was thinking it would be useful to automatically ...
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1 answer
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Windows 7 Embedded Standard Offer Remote Assistance Issue

I have run into an interesting issue with Remote Assistance on Windows 7 Embedded Standard. I am able to create a Remote Assistance Invitation and use this to connect from a technician PC, but when I ...
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0 votes
1 answer
1k views

Setting up access to FTP server and SSH server using hostapd access point on embedded system

I've recently designed the circuit board for an embedded ARM system, and the next step is to work on the software to run on this hardware. I've generated the root file system using Buildroot. I am ...
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11 votes
2 answers
22k views

Prevent data corruption on ext4/Linux drive on power loss

I have some embedded boards running American Megatrends bios with embedded linux as the OS. The problem I have is that the industrial flash ide's will be corrupted on power loss. I have them ...
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1 vote
2 answers
802 views

Strange UDP/TFTP Problem

My TFTP client only seems to be getting responses from the TFTP server to its RRQ (download requests) if I watch the traffic in wireshark. If I shut down wireshark (running on the TFTP server), the ...
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1 vote
1 answer
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PCI configuration

I would need an help to solve a problem. I work on a system based on CompactPCI platform. The system is composed by: 3U CompactPCI CPU Blades (based on Pentium M processor) 3U CompactPCI proprietary ...
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2 votes
2 answers
4k views

Installing embedded pfsense, stuck at boot loader

I am trying to install pfSense embedded image 1.2.3 RC1 onto a CF card. The box looks like it is ready to boot, but gets stuck at "Loading /boot/defaults/loader.conf" followed by "/". Can anyone ...
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4 votes
2 answers
961 views

remote network access to LAN devices - VPN/LAN

I have several energy meters (with a web server embedded) distributed in many buildings, all these sensors are connected to the local network so that can be accesed through a browser to see the real ...
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2 votes
1 answer
548 views

Embedded device for deploying network probes

Our environment has a multitude of remote subnets that we monitor by deploying Linux-based probes running various network monitoring software and other handy tools. Currently we're using surplus-ed ...
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1 vote
2 answers
4k views

Wiping out user and/or root password in embedded linux

We have a security camera system running an embedded linux. It boots with Lilo as a bootloader and has no tty access once booted. I don't know any username either. SSH/22 is open, but I don't think ...
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2 votes
2 answers
114 views

Disk encryption without cooperation from system

I have a small embedded system that supports fat32. It does not have any encryption options for the files that it saves to a external usb connected disk. Modifying the source to support encryption is ...
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0 votes
1 answer
403 views

ionice or chrt for Bonnie benchmark

I am running Bonnie benchmark on an embedded device and I am getting variable results for every run. I am contemplating using ionice and / or chrt to get around it. Can you suggest which option is ...
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1 vote
1 answer
917 views

embedded linux serial terminal

I have built a custom embedded system using debian 6.0. using /etc/inittab i have made several (8) processes running on different /dev/ttyX terminals, which i can switch between using Alt+FX key ...
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3 answers
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What could this error mean?

I am having trouble with embedded linux system which keeps outputting this error: libdirac_encoder.so.0: cannot open shared object file: No such file or directory' Any idea what this error means? ...
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