On 6/1/20 12:21 PM, Jonny Grant wrote: > Hi Mtk, > > BTW, if I add "%P-%e-%s.core" every core starts with the same > "P1000-" > > The man page shows: > %P PID of dumped process, as seen in the initial PID namespace > (since Linux 3.12) > > Do you see similar? I was only needing something to make the filename > unique, so %t is enough. I don't see the same. What do you see when you verify the change with: sysctl kernel.core_pattern Thanks, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/