Mustafa ERBAY

System architect with 20+ years in infrastructure. Building burncpu.com — an open-source social network. Personal blog: mustafaerbay.com.tr · EN/TR.

Bursa, Türkiye Joined on May 9, 2026 https://mustafaerbay.com.tr

Work

System architect · DevOps · Open-source builder

Mustafa ERBAY

Sep 27

copytruncate: A "Very Small Time Slice" Cost 33,879 Lines

#logrotate #linux #logmanagement #sysadmin

13 min read

Want to connect with Mustafa ERBAY?

Create an account to connect with Mustafa ERBAY. You can also sign in below to proceed if you already have an account.

Create Account

Already have an account? Sign in

Mustafa ERBAY

Sep 27

I Promised My Laptop 60 GiB. It Has 14.

#cicd #selfhosting #otomasyon #isyasam

12 min read

Mustafa ERBAY

Sep 27

Reverted in 90 Seconds, Broken for Five Hours

#git #cicd #production #softwarecareer

11 min read

Mustafa ERBAY

Sep 26

Docker Disabled accept_redirects, Not Me

#linux #network #security #sysctl

13 min read

Mustafa ERBAY

Sep 26

My Spam Filter Can No Longer Learn

#selfhosting #email #mailcow #rspamd

11 min read

Mustafa ERBAY

Sep 26

I Was Right Two Months Too Early

#dependencies #api #bakim #entegrasyon

10 min read

Mustafa ERBAY

Sep 25

I Made /usr Writable, systemd-analyze Said 1.5 OK

#systemd #security #hardening #linux

15 min read

Mustafa ERBAY

Sep 25

13,975 Views, Six of Them Came From Somewhere

#analytics #measurement #bots #blogging

11 min read

Mustafa ERBAY

Sep 25

One-Person Team, Seven Servers: What I Did Not Automate

#systemadministration #automation #production #workload

11 min read

Mustafa ERBAY

Sep 24

ASLR Isn't 32 Bits: Four Regions, Four Different Numbers

#linux #kernel #aslr #security

15 min read

Mustafa ERBAY

Sep 24

df Said Zero, Root Kept Writing

#linux #ext4 #disk #tune2fs

13 min read

Mustafa ERBAY

Sep 24

Rescuing a Scrapped Tablet for a Child

#android #root #cihaz #aile

11 min read

Mustafa ERBAY

Sep 23

The Agent Wrote; I Repaired It 67 Times

#otomasyon #yapayzeka #cicd #yazilimkariyeri

13 min read

Mustafa ERBAY

Sep 23

fstrim Said 2 GiB Again, and Nothing Was Freed

#linux #kernel #fstrim #ext4

15 min read

Mustafa ERBAY

Sep 23

The Neighbour Table Doesn't Know Namespaces

#linux #kernel #networking #docker

13 min read

Mustafa ERBAY

Sep 23

Why Is read_ahead_kb 8192? Linux 6.17 Believed the Disk

#linux #kernel #readahead #blocklayer

13 min read

Mustafa ERBAY

Sep 22

The 66 MiB Nobody Wrote Down: Who Sets min_free_kbytes?

#linux #kernel #sysctl #memory

15 min read

Mustafa ERBAY

Sep 22

The Server That Was Never Hacked

#fiction #story #incident #security

8 min read

Mustafa ERBAY

Sep 22

Three Numbers, One Alarm: Who Does vm.max_map_count Warn?

#linux #kernel #sysctl #elasticsearch

14 min read

Mustafa ERBAY

Sep 21

ionice: none Ignores It, mq-deadline Reads Class, BFQ Level

#linux #kernel #ioscheduler #ionice

13 min read

Mustafa ERBAY

Sep 21

Slot Zero Is Right: Which Copy Does md repair Believe?

#linux #mdadm #raid #kernel

14 min read

Mustafa ERBAY

Sep 21

Who Changed fs.file-max? A Container Did

#linux #systemd #kernel #docker

15 min read

Mustafa ERBAY

Sep 20

Sibling Denied, Grandchild Allowed: Who ptrace_scope=1 Stops

#linux #kernel #security #sysctl

12 min read

Mustafa ERBAY

Sep 20

TCP Fast Open: One RTT in the Lab, One Second on the Road

#linux #kernel #tcp #sysctl

13 min read

Mustafa ERBAY

Sep 20

55 Seconds in D State, Zero Warnings: khungtaskd's Blind Spots

#linux #kernel #sysctl #storage

13 min read

Mustafa ERBAY

Sep 19

Locked on My Laptop: the One-Way 1 of unprivileged_bpf_disabled, and bpf_jit_harden

#linux #kernel #ebpf #security

14 min read

Mustafa ERBAY

Sep 19

I Wrote 512 Bytes and Paid 1 GiB: THP, madvise and the 64 KiB Middle Road

#linux #kernel #thp #hugepages

12 min read

Mustafa ERBAY

Sep 19

Sysctl Says Zero, the Door Is Open: userfaultfd's Three Entrances

#linux #kernel #userfaultfd #security

13 min read

Mustafa ERBAY

Sep 18

dm-integrity Finds the Bad Block; To Fix It, It Wants a Mirror

#dmintegrity #linux #kernel #devicemapper

14 min read

Mustafa ERBAY

Sep 18

Zero for Root Too: kptr_restrict, dmesg_restrict and perf_event_paranoid

#linux #kernel #security #perf

12 min read

Mustafa ERBAY

Sep 18

fork: retry — Four Ceilings, One Error Message

#linux #kernel #cgroup #systemd

12 min read

Mustafa ERBAY

Sep 17

Whose Ten Percent Is dirty_background_ratio

#linux #kernel #pagecache #writeback

14 min read

Mustafa ERBAY

Sep 17

run0: Password in polkit, Caller in a journalctl Field

#run0 #sudo #systemd #polkit

8 min read

Mustafa ERBAY

Sep 17

Slow Consumers in NATS: Who Drops, Who Holds

#nats #jetstream #messaging #backpressure

8 min read

Mustafa ERBAY

Sep 17

Green Tea GC: 10 Percent on a Tree, 60 on a Map

#go #garbagecollector #greentea

8 min read

Mustafa ERBAY

Sep 16

TCP-AO: Changing the Key While the Connection Is Open

#tcp #tcpao #bgp #linux

10 min read

Mustafa ERBAY

Sep 16

Let the Disk Partition Itself: systemd-repart

#systemd #linux #gpt #dmverity

11 min read

Mustafa ERBAY

Sep 16

Written but Not Sent: The 487 KB Inside the Kernel

#tcp #linux #kernel #networking

11 min read

Mustafa ERBAY

Sep 15

I Flipped One Bit and dm-verity Stopped at Block 35816

#dmverity #linux #kernel #devicemapper

14 min read

Mustafa ERBAY

Sep 15

ssh -J Passes Through the Bastion, Not Into Its Records

#ssh #openssh #bastion #linux

14 min read

Mustafa ERBAY

Sep 15

run=1 Wasn't Enough: KSM Needs Two Separate Yeses

#linux #kernel #memory #ksm

13 min read

Mustafa ERBAY

Sep 14

tls on 106 Sockets, tls_stat Zero: kTLS Never Ran

#tls #ktls #linux #nginx

14 min read

Mustafa ERBAY

Sep 14

tcp_ecn = 2: The Door Is Open, Nobody Knocks

#tcp #ecn #linux #network

15 min read

Mustafa ERBAY

Sep 14

The Two-Hour Keepalive: 8 of 246 Sockets Read It

#tcp #linux #network #nginx

13 min read

Mustafa ERBAY

Sep 13

IP Lists Aren't Identity: Authenticated Origin Pulls

#cloudflare #nginx #mtls #security

14 min read

Mustafa ERBAY

Sep 13

Root and Still Unable to Write to /tmp: fs.protected_regular

#linux #kernel #security #sysctl

14 min read

Mustafa ERBAY

Sep 13

HSTS preload: Sending the Word Is Not Being on the List

#hsts #https #nginx #cloudflare

13 min read

Mustafa ERBAY

Sep 12

Whose IP Is in Your Logs? set_real_ip_from and a 403

#nginx #cloudflare #security #linux

15 min read

Mustafa ERBAY

Sep 12

MTA-STS Enforced on Paper: Unread for Three Months

#emailsecurity #mtasts #tls #postfix

13 min read

Mustafa ERBAY

Sep 12

sshd's New Reflex: Who Does PerSourcePenalties Lock Out?

#linux #ssh #openssh #security

13 min read

Mustafa ERBAY

Sep 11

The TIME_WAIT Scare: The 60 Seconds tcp_fin_timeout Never Touches

#linux #tcp #sistemyonetimi #nginx

12 min read

Mustafa ERBAY

Sep 11

Why One DNS Query Becomes Eight: Kubernetes and ndots:5

#kubernetes #dns #coredns #linux

14 min read

Mustafa ERBAY

Sep 11

NTLM Is Being Switched Off: Find the Fallback Reason First

#activedirectory #kerberos #windowsserver #security

15 min read

Mustafa ERBAY

Sep 10

What Free-Threaded Python Was Waiting For: abi3t

#python #performance #operations #sistemmimarisi

12 min read

Mustafa ERBAY

Sep 10

The Production Bugs That Weren’t Bugs

#production #debugging #architecture #devops

5 min read

Mustafa ERBAY

Sep 10

The Path seccomp Cannot See: Should You Disable io_uring?

#linux #kernel #security #operations

11 min read

Mustafa ERBAY

Sep 10

The sudo Rule Ubuntu 26.04 Rejected Was Already Broken

#linux #security #operations #ubuntu

11 min read

Mustafa ERBAY

Sep 9

Reclaiming Bloat Without the Lock: PostgreSQL 19 and REPACK

#postgres #database #operations #performance

12 min read

Mustafa ERBAY

Sep 9

Secure Boot's 2011 Certificates Expired and Everything Booted Anyway

#secureboot #uefi #windowsserver #linux

10 min read

Mustafa ERBAY

Sep 9

Swapping the Scheduler While It Runs: sched_ext

#linux #kernel #ebpf #performance

11 min read

16 Week Community Wellness Streak

8 Week Community Wellness Streak

4 Week Community Wellness Streak

2 Week Community Wellness Streak

1 Week Community Wellness Streak

Writing Debut

Want to connect with Mustafa ERBAY?