Chris Perl

Chris Perl joined Jane Street in 2012. Before that he worked at the National Hockey League as a Systems Administrator. He enjoys learning about Linux and Unix systems, dynamic tracing and in general all things debugging.

4 posts by Chris Perl

Oct 07, 2015 | 1 min read
rsync rounds timestamps to the nearest second
I’m not sure how I’ve managed to use rsync for so many years without ever noticing this, but hey, you learn something new every day!...
Dec 01, 2014 | 2 min read
Inspecting the Environment of a Running Process
Sometimes its useful to be able see the values of environment variables in running processes. We can use the following test program to see how...
Jul 09, 2014 | 3 min read
Inspecting Internal TCP State on Linux
Sometimes it can be useful to inspect the state of a TCP endpoint. Things such as the current congestion window, the retransmission timeout (RTO), duplicate...
Apr 17, 2014 | 28 min read
How Does Automount Work Anyway?
Introduction