1. Introduction
2. Todo
3. 1. System programming
4. 1. 1.1. GNU linker scripts
   2. 1.2. nm and linker (ld)
   3. 1.3. How data movement changes a destination register
   4. 1.4. General embedded ASM linked in C
   5. 1.5. Move sign & zero-extends a single byte
   6. 1.6. movabsq
   7. 1.7. x86_64 register (fiks technical grade)
   8. 1.8. analisis kenapa pakai movabsq, daripada movq
   9. 1.9. analisis patch movq pakai 0xffffffff
   10. 1.10. ext4 unknown RO compact features
   11. 1.11. qemu custom cpio HDA
   12. 1.12. step TCP
   13. 1.13. GDB attach
   14. 1.14. hasil oprek socket programming, case socks5 server
   15. 1.15. fix ncurses kernel build
   16. 1.16. PHP-SRC variadic params
   17. 1.17. PHP-SRC minit()
   18. 1.18. gcc compiler visibility
   19. 1.19. load effective address
   20. 1.20. AT&T asm prelude
   21. 1.21. printf format specifier
   22. 1.22. predefined macros
   23. 1.23. vt-hexdump
   24. 1.24. ELF64 text only
   25. 1.25. ELF64
   26. 1.26. POSIX getopt_long
   27. 1.27. linux virtual memory map (old)
   28. 1.28. linux x86_64 memory map
   29. 1.29. machine dependent type
   30. 1.30. I/O format of integer types
   31. 1.31. types war
   32. 1.32. bits data models
   33. 1.33. ELF struct datatype
   34. 1.34. finding .shstrtab section
   35. 1.35. print binary using shift and masking
   36. 1.36. all about ASan & debug symbol
   37. 1.37. asm volatile
   38. 1.38. amd64 endianness
   39. 1.39. linker --wrap symbol
5. 2. ARM
6. 1. 2.1. Thumb, Thumb-2, ARM, AArch64 introduction
   2. 2.2. ARM M0+ registers
   3. 2.3. ARM AArch32 ABI Convention
   4. 2.4. ASM gnu-as direction collection
   5. 2.5. branch exchange (BX)
   6. 2.6. calling a main function
   7. 2.7. ARM MRS instruction
   8. 2.8. difference between thumb-1 (T16) and normal ARM
7. 3. Rust stuff
8. 1. 3.1. Rust Cursor & fseek concept
   2. 3.2. Rust bytes has_remaining() method
   3. 3.3. How Rust into() Box + Error analysis
   4. 3.4. Rust buffer advance
   5. 3.5. Rust RESP get_line analysis
   6. 3.6. postgresql - get() generic function signature
   7. 3.7. Rust build logging
   8. 3.8. Rust tonic gRPC server
   9. 3.9. Rust tokio-postgres connection config example
   10. 3.10. miri rust setup
9. 4. Embedtronics
10. 1. 4.1. picotool build
    2. 4.2. debug pico with another pico
    3. 4.3. pico sdk install & cmake template
    4. 4.4. arm-none-eabi-gdb debugging with openocd
    5. 4.5. analysis how printf rp2040 work under low level stuff
    6. 4.6. RP2040 chip static RAM layout
    7. 4.7. stdio_init_all() analysis
    8. 4.8. pico_default_asm_volatile
11. 5. Math
12. 1. 5.1. Set formula
    2. 5.2. Set stuff
    3. 5.3. Logika
    4. 5.4. kumpulan soal Matematika Diskrit
    5. 5.5. asal usul rumus sudut vektor
    6. 5.6. transformasi elementer
    7. 5.7. matrix invers
13. 6. Cryptography
14. 1. 6.1. Alur koneksi ke RPC server telegram
    2. 6.2. ca-certificates
    3. 6.3. PAP, CHAP, EAP
15. 7. Server
16. 1. 7.1. Cgit setup
    2. 7.2. config HTTPS nginx
    3. 7.3. Setup virtual network interface
    4. 7.4. ip aliasing
    5. 7.5. setup bridge enp0s16u1
    6. 7.6. Setup shadowsocks proxy server
    7. 7.7. Alpine install on live cd qemu
    8. 7.8. Run router-OS on qemu
    9. 7.9. setup linux bridge between RouterOS & Alpine linux hosts
    10. 7.10. Linux iptables preview (try making a nat)
    11. 7.11. Linux QEMU network address translation
    12. 7.12. QEMU block 8.8.8.8 from host
    13. 7.13. logic netfilter linux kernel
    14. 7.14. resep nginx oleh pak hanif
    15. 7.15. ip command
    16. 7.16. QEMU default network
    17. 7.17. Mikrotik firewall
    18. 7.18. bring wlan0 connectivity to the network namespace linux & test routerOS
    19. 7.19. network namespace + NAT notes
    20. 7.20. deploy Docmost on server
    21. 7.21. fix vthxxxxxxxx is not connected to docker0
    22. 7.22. php-fpm config
    23. 7.23. systemd config template
    24. 7.24. setting up ubuntu server with qemu + custom bridge
    25. 7.25. setting up routeros + ubuntu server + archlinux client
    26. 7.26. SQL authentication freeradius server
    27. 7.27. Linux netplan
    28. 7.28. sshfs
    29. 7.29. TLDR qemu
    30. 7.30. qemu q35 vs i440fx
    31. 7.31. qemu & dedicated nic + macvtap
    32. 7.32. alpine install ssh + firefox lite qemu
    33. 7.33. resizing qemu image
    34. 7.34. docker snippets
    35. 7.35. install routerOS.iso (not chr) on qemu
    36. 7.36. change default postgresql data dir
17. 8. Database
18. 1. 8.1. psql command
    2. 8.2. psql snippet
    3. 8.3. PostgreSQL database creation flow
    4. 8.4. how to use SQLX cli tools for db migration such laravel migrations
    5. 8.5. Postgresql internal (server)
    6. 8.6. Postgresql II SQL language docs summary
    7. 8.7. system table in pgsql (catalog)
    8. 8.8. pgsql functions()
    9. 8.9. postgresql database HBA
    10. 8.10. PostgreSQL grant
19. 9. Dockerfile boilerplate
20. 1. 9.1. debian:bullseye php-8.3 dev env
    2. 9.2. php:8.3.20-fpm-bullseye + nginx prod
    3. 9.3. php:8.3.20-bullseye dev env
21. 10. PHP (web)
22. 1. 10.1. laravel 12 service container
    2. 10.2. laravel 12 custom auth guard + tables
    3. 10.3. laravel Socialite setup
    4. 10.4. laravel pgsql migration setup
    5. 10.5. JWT
    6. 10.6. laravel named routes
    7. 10.7. installing tymon/jwt-auth with custom guard
23. 11. Other
24. 1. 11.1. bookmarks highly useful link
    2. 11.2. Resume alpro
    3. 11.3. Resume alpro double linkedlists
    4. 11.4. Rumus sector disk Linux
    5. 11.5. Regex notes
    6. 11.6. template workspace json vscode
    7. 11.7. Protobuf
    8. 11.8. Subnetting
    9. 11.9. Inter-VLAN routing
    10. 11.10. Tealinux qemu promp & testing
    11. 11.11. Tealinux qemu promp & testing 2
    12. 11.12. binary operation
    13. 11.13. catatan subnetting from scratch
    14. 11.14. set PATH fish shell
    15. 11.15. tree
    16. 11.16. clang-format
25. 12. Gallery
26. 1. 12.1. july-2025