gccmatrix-decomposition

Gcc gives [1] 504 ...what is this?

I compiled a c recipe and have no idea if I got ir right. It did compile. I matched a matrix to the specified format and ran: ./croutLU matrix1 & tee > b The response the first time seemed successful but "b" was empty. The second run of the same command generated: [1] 654 And a hang...I rebooted, recompiled and ran it again: [1] 504 I am using a freeBSD. What is "[1] 504" Can anyone tell me what happened here. Did something go right maybe? Or wrong? Thank you Jonathan Engwall

Solution

  • "[1] 654" is typically written when you launch a command in background, "1" indicate you have 1 process in parallel and "654" is the pid of the process

    Example :

    pi@raspberrypi:~ $ pwd &
[1] 5098
/home/pi
pi@raspberrypi:~ $

    Note : the command jobs gives the list of processes running in background

    If I enter pwd & tee > t then I enter the line aze then ^d to finish the tee I have that (Fini means done) :

    pi@raspberrypi:~ $ pwd & tee > t
[1] 5331
/home/pi
aze
[1]+  Fini                    pwd
pi@raspberrypi:~ $ cat t
aze
pi@raspberrypi:~ $

    As you can see pwd is started in background, in your case ./croutLU is started in background and I suppose you just enter ^d to finish the tee so b is empty