Matlab system command doesn't work properly on linux platform

Question

Janne Karjalainen 2020-5-22

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评论： Janne Karjalainen 2020-5-22

When execute system('hostname -s') -command in matlab, process go to linux command line and in linux command line making exit command, process will go back to matlab command line with hostname.

Example run:

>> system('hostname -s')

[j...al@oulng208 users3/j...al]$exit

exit

oulng208

ans =

0

>>

Why matlab goes to linux command line? It should stay in matlab.

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Rik 2020-5-22

What do you mean? The purpose of the system function is to call the OS command line.

Janne Karjalainen 2020-5-22

Yes, purpose is to get hostname from OS in matlab, somehow matlab is directing to linux command line.

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Answer 1

Rik 2020-5-22

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在 MATLAB Online 中打开

If you want to capture the output to a Matlab variable, you should use the second output:

[status,response]=system('hostname -s');

I don't have Matlab installed on my Ubuntu VM, but this works in Octave, so it should do the trick.

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Answer 2

Walter Roberson 2020-5-22

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https://ww2.mathworks.cn/matlabcentral/answers/530053-matlab-system-command-doesn-t-work-properly-on-linux-platform#answer_435978

https://www.gnu.org/software/bash/manual/html_node/Bash-Startup-Files.html

You have a BASH_ENV or equivalent for your shell, that is triggering interactive execution for the non-interactive case.

Hypothetically there could also be issues if you have SHELL environment variable set to include flags that should not be set for non-interactive work.

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Janne Karjalainen 2020-5-22

Issue was caused by shell environment change. Originally shell is tcsh and before staring matlab it is changed to bash. I fixed to tsch and now system commands are working in matlab. Thanks for comments!

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