The Linux kernel implements the Completely Fair Scheduling (SCHED_NORMAL) algorithm as its default scheduling algorithm for scheduling real-time processes. How to modify the linux kernel such that the default scheduling policy is set to round-robin (SCHED_RR) or any other scheduling policy ? Is there a generi…
push/pop segmentation fault in simple multiplication function
my teacher is doing a crash course in assembly with us, and I have no experience in it whatsoever. I am supposed to write a simple function that takes four variables and calculates (x+y)-(z+a) and then prints out the answer. I know it’s a simple problem, but after hours of research I am getting no where…
Linux, scanf in loop, while stdin already loaded
I have trouble with scanf and a loop on linux. If in the shell Linux, if I execute my file like this : Then the result will be this : Here : lol Here : lol Here : lol Here : lol Here : lol Here : lol Here : lol Here : lol Here : lol Here : lol
possible to script to open multiple terminals in local machine and ssh to different servers?
This is what I’d like to do: On my local linux system (Ubuntu), I’d like to write a script which would open multiple terminals, and do an ssh to different servers (the list of servers would be in a text file which the script will read), and execute a program on each of those servers. Is this possi…
Building meta-virtualization layer in yocto
I am trying to add the meta-virtualization layer in my yocto project. The layer depends on openembedded-core and multiple layers provided by meta-openembedded. Following is the structure of my bblayers.conf file after adding the meta-virtualization layer and it’s dependencies. However, when I try to bui…
How to remove files without certain extension?
How to remove all files without the .txt and .exe extensions recursively in the current working directory? I need a one-liner. I tried: Answer Try this. The above command will remove all the files other than the .exe and .txt extension files in the current directory and sub directory recursively.
Running 32-bit code in 64-bit process on Linux – memory access
I’m experimenting with running 32-bit code inside a 64-bit Linux process. The 32-bit code is completely self-contained, it makes direct IA32 system calls on its own. If I were to load this code in a 32-bit process, it would run just fine. Initially, I thought I could just allocate a stack for the 32-bit…
In bash got unwanted newlines after sed and cat >>
I’m trying to substitute some lines in /etc/hosts file with my script here: It searches e.g. for lines like and replaces the line (if it’s found) with a sed command to nothing, but adds afterwards e.g. to I’m having to do (?) this because my LAN network addresses are changing very often (exa…
ssh2 module fails silently with creds that succeed from CLI
I’ve successfully ssh’d into Google Cloud Compute via CLI with a command like the following: But using the ssh2 module isn’t giving any output, including errors. I’m tailing /var/log/secure as I’m debugging the node script and I can see log entries when I ssh in and close the ses…
Get specific day of week of the upcoming Canada day on Linux
How to use cal command to add the calendar of next July to the end of the file, for example, myfile, and what day of the week the upcoming Canada Day fall on? So far I just have this command: I feel like I am not doing it correct and I don’t know which command to use, to find the