I am working on a simple network application under Linux, where I need to read the following two properties: The number of bytes in receive buffer, which are ready to be read. The number of bytes in socket send buffer, which has not been sent yet. The receive buffer (1st property) could be obtained using FION…
Unable to get correct output in linux script
I wanted to get the remaining(free) percentage of RAM usage as output storing in variable for further processing. Instead m getting $ac output as Please help Answer works fine for me. (BTW, awk can do grep’s work too: )
Why count differs between ls and ls -l linux command?
I had a directory with number of files and need to check the count of files present in it. I tried the following two commands: and found there are differences while using both commands. (ie. number of files is greater in the usage of second command while comparing to the first command.) I would like to know t…
Ptrace prevents signal from interrupting pselect() in traced process
I’m trying to monitor syscalls for a binary using ptrace. The binary sleeps in pselect() and without ptrace, a SIGQUIT makes it return from pselect. The mask of blocked signals passed to pselect includes SIGQUIT. When executed with ptrace, it exits from sys_pselect6 but not all the way out of glibc̵…
How do I debug Android native code into kernel?
I compiled goldfish kernel with: I started the AVD with the compiled kernel. emulator -kernel goldfish/arch/arm/boot/zImage -avd TestAVD I pushed a compiled c program onto AVD. And I downloaded the libs (I’m not sure if it’s the proper way) run gdbserver: forward port: run gdb specify the search d…
how to install software on linux without root permissions
I need some help to install the ABySS assembler on PuTTY (virtual Linux) without root permission (as it takes a long time going via IT department etc.). To be honest I’ve no idea where to start from, so I’ll be very appreciated for step-by-step guide if that is not too much to ask. Thanks in advan…
Concept of Virtual Environments
Hope this question belongs here. As a linux noob, I am sure my question sounds confusing and heavily non-technical, but please help me understand this. Anaconda Python Distribution comes with the concept of creating environments where I can maintain a variety of python versions and specific packages based on …
updating product/vendor id on Raspberry Pi (CP210X)
Running “uname -a” on my Raspberry Pi will yield the following: Linux tm-gw 4.4.14-v7+ #896 SMP Sat Jul 2 15:09:43 BST 2016 armv7l GNU/Linux My problem is that I have a USB device which vendor and product ID isn’t registered in CP210x.c file, which – again – means that even thoug…
Closing then opening standard input in C under Linux
I have a C console application under Linux (Raspbian – Raspberry Pi). The program has some character animation – it prints out messages character by character. For example, the text Please give me your name! is printed out completely after 5 seconds (char by char). Afterwards, the user is asked to…
How to run Linux on a QEMU ARM Versatile machine?
I’m trying to run linux on qemu, especially the versatile version. I downloaded qemu and linux from github. (qemu : https://github.com/qemu/qemu.git, linux : https://github.com/torvalds/linux.git) I think these two repositorys are the main project of them. Anyway, I compiled linux with 2 steps. make ARC…