Allow GitLab CI to use Docker Registry with Self Signed Certs
GitLab CI can trust private Docker registries with self-signed certs - here's the dind config.
Linux
15 posts
Installing GitLab on RedHat Enterprise 5 RHEL 5
Ubuntu-centric GitLab docs don't work on RHEL 5. Here's how to force it into submission.
rsync is MUCH faster than scp
Benchmark test reveals rsync outpaces scp by 2-10x on file transfers - practical performance comparison for deployment workflows.
Automated ClamAV Virus Scanning
Automate ClamAV virus scanning on Linux with cron and firewall tuning for continuous protection.
Looking for abusive clients in your web server logs
Find IPs hammering your web server with a single command: `cut -d ' ' -f 2 | sort | uniq -c | sort -nk 1`
Hard Drive Fail
Server hard drive failed - don't forget to back up /etc and apt package lists along with your data.
Server Migration
Server migration complete - sites, apps, and email now live elsewhere. Report issues if you spot them.
Why I love Debian (and PostgreSQL)
Load average 239+ but SSH worked perfectly: Debian + PostgreSQL kept systems responsive even under extreme duress.
Using IPTables to Prevent SSH Brute Force Attacks
Two iptables rules throttle brute-force SSH attacks: three tries, then a three-minute lockout that bots can't bypass.
How to identify the process listening on a port
Use fuser to identify which process owns that unexpected port immediately.
Apache Proxy & Making Things Look Nice
Apache mod_proxy consolidates multiple services on a single port 80, making your dev stack accessible with clean URLs and proper routing.
How to block an IP in Linux
Block malicious IPs in Linux with iptables - a simple script keeps brute-force attackers from hammering your server.
Home Backups
Bash rsync scripts keep backups and remote MacBook storage in sync via cron - set ssh keys and forget.
How to cleanout your postfix queues by sender
A massive postfix queue backup teaches lessons in email management - qshape uncovers hidden bottlenecks before they cripple the server.
Index page issues when putting JBoss behind Apache
Switching from .seam to .html files in Apache-proxied JBoss breaks index pages - a gotcha that directory listings can't solve.