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Questions tagged [embedded-linux]

Embedded Linux stands for the use of Linux in embedded computer systems such as smartphones.

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SSH: Invalid key length [on hold]

I have been trying to ssh into an embedded device that is running "SSH-2.0-dropbear_2015.67". The version of my client according to ssh -V is OpenSSH_7.6p1 Ubuntu-4ubuntu0.3, OpenSSL 1.0.2n 7 Dec ...
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Unable to print the message sent from user space C application to Linux kernel module

I have developed a simple Linux kernel module : #include <linux/init.h> #include <linux/module.h> #include <linux/fs.h> ssize_t exer_open(struct inode *pinode, struct file *pfile) {...
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Set up direct ethernet connection Linux<-->Android

I have an Android 6.0 SoC (ODroid C2) that I'm trying to connect directly to an embedded Linux machine via either regular ethernet or ethernet over USB (via the g_ether module) There are 2 services ...
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Zynq/ Petalinux : Unknown command 'gzwrite' - try 'help'

For folks familiar with Zynq, Petalinux and u-boot. I am using a microzed board, and trying to boot it using an SD card. The boot.bin file is generated using Petalinux 2018.3 SDK. The u-boot runs and ...
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How to troubleshoot emulated RS232 communication to Verifone MX915

We have many Verifone MX915 devices in our production retail environment. Since implementation, the MX915 devices have had UI lockup problems. Through a lot of trial and error, we determined that ...
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426 views

Running tcpdump starts ssh flood

I have runtime Linux running in a PLC. My development machine is running Ubuntu 14.04. The PLC and the development machine are connected through a five port switch. I ssh to PLC from my development ...
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1answer
43 views

How to ping from a client in the network to a server not in the network connected on different interfaces on same linux box

I am working on one Linux box. I want something like this. network--->wlan0---->eth0-->other server. Both wlan0 and eth0 interface reside inside same Linux box. I am using dhcp which is assigning ...
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354 views

Autoconf from /etc/network/interfaces is not working

I want to disable autoconf of IPv6 for which I am making entries in /etc/network/intefaces file as below. Before making this changes I use "ifdown eth0" iface eth0 inet6 static address <...
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1answer
610 views

How to setup embedded Linux private vlan

I am trying to setup a vlan between 2 embedded Linux SOCs on wireless IPTV STB (set top box) using vconfig. The physical connection between the SOCs is a Marvell 88E60xx switch. The issue is that the ...
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105 views

Possible Operating System for Linux-experienced admins when configuring a MikroTik RouterBoard RB951Ui-2HnD as balance-loader

I have just bought a MikroTik RouterBoard RB951Ui-2HnD router and would like to try it as balance-loader, if that is possible. Until now I have just used some desktop computers with Zentyal running ...
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128 views

IPSEC stack low speed

I am working on Openswan IPSEC Implementation for Linux-kernel 2.6.35.9 My concern is when i do speed test using IPSEC kernel Images and without running IPSEC service i get speed of 40Mbps and 10Mbps....
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334 views

How to create a readonly root linux: Can be mounted as writeable for persistent changes? [closed]

I'd like a read only file system that runs almost entirely in RAM but the compact flash or hardrive can be mounted and made writeable to make persistent changes. How do I do this on Linux? I've ...
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11k views

Bypass DNS Server lookup by using /etc/hosts when using a dynamic IP address

It is my understanding that the need to query external DNS servers for commonly accessed names can be reduced if those commonly accessed names are present in /etc/hosts. Now, I have a situation ...
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419 views

One way ping on an embedded Linux system

I'm facing a networking issue with an embedded Linux system in a private network. We have a network that consists of a few tens of servers connected through a switch with one of the servers acting as ...
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641 views

using Linux as a bootloader?

I have an embedded device with a SPI connected flash. Basically this means the device boots its bootloader and Linux kernel from a small flash part. As the device boots, but before the root ...
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312 views

small and cheap embedded system [closed]

for a home automation project I'm search for a small and cheap computer which is capable of running a small webservice. It should have the following features: Linux enabled (Debian, OpenWRT, ...) ...
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1k views

Low-maintenance Linux distro for “info screen”?

What Linux distribution would you recommend for a host with sole function of displaying an informational WWW page to the public with minimum maintenance? The hardware is a rather simple PC with LAN ...
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1answer
2k views

Facing issue with cron on embedded linux

I have a SAM9 based board running embedded linux using buildroot package. I added the crond and crontab support to busybox from make menuconfig and built the rootfs and flashed it to my board. The ...
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Forwarding linux terminal from serial port to TCP with socat

I'm working on embedded ARM platform, Slackware. I'm using G24 Java modem which is configured to forward data between ports /dev/ttyS1 and /dev/ttyACM0, so anything that goes onto any of these ports ...
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1answer
113 views

Linux audio capture at a rate of 20ms is choppy

I am currently working on an embed linux video server. When I deployed the application to the boards we are planning on using for production I noticed that the audio was noisy. I discovered that the ...
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2answers
1k views

What is the best file extension for a firmware image made with dd?

I currently have an embedded video server that I developed using embed linux, c and c++. I currently have our assembly line workers flash the ide drives from a usb flash drive like so: dd if=/dev/...
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1answer
542 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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23k views

What is mdev and how to /dev/* nodes get created in Linux?

Our Linux kernel is 2.6.31 running on an embedded MIPS processor with busybox. The initialisation script (rcS) starts mdev with: echo "/sbin/stbhotplug" > /proc/sys/kernel/hotplug mdev -s Can ...
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3answers
1k views

Booting a new Linux kernel from within Linux?

Anyone know of a way to "boot" another Linux kernel from within Linux, discarding the original kernel/initrd? The idea is that I can boot my server from a small read only copy of Linux that does some ...
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665 views

Does NMBD depend on DHCP?

I am trying to debug a SMB share issue on an embedded Linux setup. Before diving into source code, I want to make sure this is not a configuration problem. So here is my case: Scenario-1: dhcp server ...
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14k views

Busybox, netstat, no -p

I have an ultra old (don't ask why) BusyBox (BusyBox v1.01 (2008.12.19-21:31+0000) Built-in shell (ash)) on my DreamBox. I would like to find out which process opened which connection using netstat. ...
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63 views

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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749 views

Using Minicom While Connected

I am running Debian on an Embedded system and am trying to use minicom to periodically get the signal strength of my USB EVDO modem using the AT+CSQ command. When the modem is not connected, I can ...
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156 views

How to increase The initial RAM size(16M) of PPC440 in linux 2.6 kernel

I am building cuImage. When I try to put in openSSH, I run out of 16M RAM boundary which is set during early kernel turning on MMU, so it wont boot up. Can anyone tell me how to increase that? Inside ...