I am trying to use psutil library to get users logged in to linux system. For that i used function psutil.users() I want to extract the username from this list, what shall i do? Also what is suser here? Answer I don’t know why they choose the name suser, but it’s actually a namedtuple. That should…
jsreport failing on looking up extensions
So I recently started working on a linux machine (ubuntu 16.04) and followed the installation instructions here http://jsreport.net/downloads/. When I run npm start –production I get And I have no idea why. It was working fine on mac but now it is looking for this non-existent tmp file in ember. I’…
What additional purpose can ai_protocol serve in hints while calling getaddrinfo() when ai_socktype is already specified?
The getaddrinfo accepts struct addrinfo *hints as the third argument which can be used to specify the criteria for selecting socket addresses to be returned by this function. The documentation says that we could set ai_socktype as well as ai_protocol to specify our selection criteria. However, I am unable to …
How to make an overlay which capture no events
I would like to draw some sort of window on top of all the other windows. For example, to display some debugging infos (like conky) or things like a timer. The main thing is that I would like to able to continue using the other windows while using it (the events go through transparently). I’ve tried doi…
Converting watch into a unit file systemd
I’ve got a shell script as follows ss.sh The requirement is that I need to use this script with the watch command. And I’d like to make this into a systemctl service. I did it as so. sc.sh And in my /etc/systemd/system, log_info.service When I run systemctl start log_info.service, It runs but not …
Error while pulling image from docker registry
I am trying to pull registry image from docker. docker run -d -p 5000:5000 –restart=always –name registry registry:2 But it gives an error like below: docker: Error while pulling image: Get https://index.docker.io/v1/repositories/library/registry/images: dial tcp 52.73.159.23:443: getsockopt: no r…
How many NUMA nodes on a Power8 processor
I am using Ubuntu 15.04 on a two sockets Power8 machine, each socket has 10 cores. “numactl -H” outputs: The problem is, are there two NUMA nodes on each Power8 processor? Any why one has memory but the other one has nothing. I can’t find any document about this. Any information would be app…
How to install mono 3 on Debian testing?
I want to compile the Unreal Engine on my Debian Liunx (testing) box, which needs the mono package libmono-corlib4.0-cil installed that depends on the mono-runtime in version 3. However, on my Debian box I have installed mono in version 4 and libmono-corlib4.5-cil (4.5 instead of 4.0). So I tried to install t…
how to alternate continously Signal handler
I want to write a program in c for linux that catchs the first SIGUSR1 signal, ignores the second one and continue in this behaviour (catch-ignore) for the successive SIGUSR1 signals. I wonder how to keep alternating between the two handlers, because once i set the handler to SIG_IGN, the signal will be ignor…
Error “undefined reference to `cprintf”” during executing make command in qemu in linux kernel
(1) This is the main function (runproctest.c): (2) defs.h: (3) console.c (4) main.c (5) Here is my Makefile: and when I enter make qemu there is a problem: I don’t know why this happens.. Answer in the makefile, this line: should be: There may be other ld commands in the make file with similar problems.…