" I also seen which i could not redirect STDERR without having also redirecting STDOUT. The solution wherever programA sends STDOUT to STDIN of programB, then redirects STDERR to some log file: programA two> /var/log/programA.log We will increase a workaround for that in Rufus three.19, but Meanwhile, and as @sudodus https://chelwoodk825plp0.dm-blog.com/profile