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• Apr, 07, 2021
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A good entry-level explanation of some of the hedge fund technology stack: https://www.efinancialcareers.com/news/2021/04/technology-jobs-hedge-funds

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• Mar, 31, 2021
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Data and Computer Communications – by William Stallings – not my favorite book, however this is a fully complete book on all aspects of network protocols. We’re using it in my graduate course “Advanced Network Protocols and Standards”. Because the Stallings book is not the easiest to get through, I supplement my reading with “Computer […]

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• Mar, 06, 2021
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Previously, I posted about Rocky Linux. Scientific Linux however is very interesting to me as well. Like CentOS, Scientific Linux was a RHEL replication. It was fully funded and worked on by CERN and Fermilab. The purpose of Scientific Linux was to deliver a unified platform used in the Physics community. When Red Hat took […]

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• Mar, 06, 2021
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I found this youtube video on the differences between Investment Banking and Hedge Funds in terms of employment. I thought it was insightful. Though I’m not on the investment side of the business, it’s still interesting. As a technologist, we work on very similar tech stacks. In general I prefer the Hedge Fund life. It’s […]

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• Dec, 17, 2020
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https://www.zdnet.com/article/goodbye-centos-hello-rocky-linux/ Red Hat has moved CentOS from being an Enterprise Linux to feeding the Red Hat Enterprise Linux. What that means that instead of being upstream in terms of publication (making it the same binary as RHEL), it is not being used for testing software before that software is promoted to RHEL. In response, a […]

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• Nov, 25, 2020
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abrtd can be configured to collect application core dumps in /var/spool/abrt, below are quick examples on how to configure and to use the product. set up to capture application core dumps stop abrtd if it’s running systemctl stop abrtd make sure all the packages are installed yum install abrt abrt-addon-ccpp abrt-tui abrt-install-ccpp-hook install configure the […]

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• Sep, 22, 2020
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INSTALL1 yum -y install tigervnc tigervnc-server  CONFIGURE:cp /usr/lib/systemd/system/vncserver@.service /etc/systemd/system/vncserver@:1.service vim /etc/systemd/system/vncserver@:1.service edit /etc/systemd/system/vncserver@:1.service with the username # vim /etc/systemd/system/vncserver@:2.service [Unit] Description=Remote desktop service (VNC) After=syslog.target network.target [Service] Type=forking # Clean any existing files in /tmp/.X11-unix environment ExecStartPre=/bin/sh -c ‘/usr/bin/vncserver -kill %i > /dev/null 2>&1 || :’ ExecStart=/usr/sbin/runuser -l <USERNAME>-c “/usr/bin/vncserver %i” PIDFile=/home/<USERNAME>/.vnc/%H%i.pid ExecStop=/bin/sh -c ‘/usr/bin/vncserver […]

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• Aug, 18, 2020
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The attachment is a SQL Injection cheat sheet in PDF format.

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• Aug, 12, 2020
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There are some slight differences between RHEL 7 and RHEL 8 kickstart syntax. Here is a helpful guide that I found: https://www.golinuxcloud.com/rhel-centos-8-kickstart-example-generator/#Kickstart_Generator Networking: Set up bonded Interfaces: https://linuxconfig.org/how-to-configure-network-interface-bonding-on-red-hat-enterprise-linux-8 Install openonload download the latest version of openonload from https://support.solarflare.com/wp/onload Infiniband I found a small error in the install.pl that prevented me from installing it on RHEL8. […]

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• Aug, 12, 2020
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This article at a high level is incredibly interesting. From a Sysadmin perspective, I’d encourage you to think about how that would work within an existing framework like Ansible, Puppet, Chef, Jenkins or some CICD pipeline. Additionally – Document your automation. Over time it will become hard to remember the triggers, or even the exact […]