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SMTP 550 5.7.1: Relay access denied – causes & fix
mikweb2025design profile

SMTP 550 5.7.1: Relay access denied – causes & fix

#email #devops #sysadmin #security
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2 min read
When Code Meets Life: Applying the Sysadmin Mindset to Family Chaos & Home Repairs
jronegit profile

When Code Meets Life: Applying the Sysadmin Mindset to Family Chaos & Home Repairs

#sysadmin #family #homerepairs #philosophy
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8 min read
dig cheat sheet: the DNS queries I actually use
mikweb2025design profile

dig cheat sheet: the DNS queries I actually use

#dns #linux #sysadmin #tutorial
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2 min read
What I learned from measuring my build server power consumption for 7 months
schiff_heimlich profile

What I learned from measuring my build server power consumption for 7 months

#devops #sysadmin #linux #monitoring
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2 min read
How to Check if Windows Is OEM, Retail or Volume License
stevegass profile

How to Check if Windows Is OEM, Retail or Volume License

#windows #powershell #sysadmin #tutorial
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6 min read
DMARC failure reports: an RFC 9991 checker in stdlib Python, run on OpenDMARC's output
jose_pollman_fa7c6ec43cdd profile

DMARC failure reports: an RFC 9991 checker in stdlib Python, run on OpenDMARC's output

#email #python #sysadmin #opensource
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11 min read
Building an Isolated Security Camera VLAN: Inter-VLAN Routing and RTSP Stream Extraction for Lorex Systems
routeripguide profile

Building an Isolated Security Camera VLAN: Inter-VLAN Routing and RTSP Stream Extraction for Lorex Systems

#networking #security #homelab #sysadmin
Comments
3 min read
My First Hour on a New Linux Server: A Six Step Checklist
jabedhossainxyz profile

My First Hour on a New Linux Server: A Six Step Checklist

#linux #devops #security #sysadmin
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2 min read
Docker: port is already allocated
mikweb2025design profile

Docker: port is already allocated

#linux #devops #sysadmin #tutorial
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2 min read
Finding Why SSH Logins Fail at the systemd-logind Session Limit
et-ducky profile

Finding Why SSH Logins Fail at the systemd-logind Session Limit

#linux #ssh #systemd #sysadmin
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4 min read
Aruba CX AOS-CX Hardening: A Practical Baseline
hansstudy profile

Aruba CX AOS-CX Hardening: A Practical Baseline

#networking #security #cybersecurity #sysadmin
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5 min read
A Stop Job Is Running at Linux Shutdown and How to Find the Unit
et-ducky profile

A Stop Job Is Running at Linux Shutdown and How to Find the Unit

#linux #systemd #sysadmin #troubleshooting
Comments
3 min read
Git Things That Are Easy to Mess Up (Until They Bite You)
jronegit profile

Git Things That Are Easy to Mess Up (Until They Bite You)

#git #versioncontrol #devops #sysadmin
Comments
11 min read
Three read-only PowerShell exporters for Microsoft 365 and Windows Server admins
cloudekhosting profile

Three read-only PowerShell exporters for Microsoft 365 and Windows Server admins

#powershell #microsoft365 #sysadmin #windows
Comments
2 min read
Windows Activation Error Codes: Complete List With Fixes (2026)
stevegass profile

Windows Activation Error Codes: Complete List With Fixes (2026)

#windows #sysadmin #powershell #tutorial
Comments
9 min read
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