Author:
erics, March 29th, 2026
A deep-dive into a phantom AWS networking failure where every indicator said the server was healthy, every diagnostic came back clean, and the fix turned out to be one CLI command that most troubleshooting guides never mention. March 29, 2026 · Vermont, USA → us-east-1 · ~18 min read The Sunday Morning Alert It started […]
Categories: Technology Tags: AWS, BGP, Cloud Infrastructure, DevOps, EC2, eip, Elastic IP, ENA, Incident Response, Internet Gateway, mtr, NAT, Networking, Packet Loss, Postmortem, Production Outage, sysadmin, TCP, troubleshooting, VPC
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Author:
erics, October 21st, 2009
Here is a quick-start guide: http://wiki.freebsd.org/DTrace The kernel config files are located in: /usr/src/sys/{ARCH}/conf. Create a new one called DTRACE: [code] # cd /usr/src/sys/amd64/conf # cp GENERIC DTRACE # vim DTRACE [/code] For DTrace support, add the following options: [code] options KDTRACE_HOOKS # all architectures – enable general DTrace hooks options DDB_CTF # all architectures […]
Categories: How-To's, Technology Tags: dtrace, FreeBSD, howto, sysadmin
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