Remo

Category: Essays

  • PHP 安全更新

    10 月 21 日，PHP的CVE-2026-109618 和 CVE-2026-109619，可能导致未经认证的远程代码执行。本服务器运行 Debian 13，使用 Nginx、PHP-FPM 和 MariaDB。将 PHP 和相关扩展升级到 8.4.27，重启 PHP-FPM。

  • 升级服务器系统

    Upgrade server system

    The system was upgraded to Debian 13 x86_64.

    SSH is enabled only. The underlying components are Nginx 1.26.3, PHP 8.4.23, MariaDB 11.8.6, Docker 26.1.5, Compose 2.26.1, and Swap 4 GB.

    Apply resource/log limits to SSH, nftables, Fail2ban, PHP-FPM, MariaDB, and Docker.

    SSH password login disabled; root user only allowed key-based login; nftables defaults to denying and allowing logins. 22/80/443/1935.

    HTTPS Certbot scheduled renewal is now enabled.

  • 尝试使用MkDocs给实验室编写公开文档

    Try using MkDocs to write public documentation for the lab.

    https://remyuu.github.io/VIS_Hiroshima

    I wrote some documentation for the lab on how newcomers can connect to the school's computer lab server using SSH. It covers Chinese, English, and Japanese, and supports submitting edits.

  • ai.remoooo.com

  • 服务器增加虚拟内存

    The server increases virtual memory.

    free -h
df -h /

fallocate -l 4G /swapfile
chmod 600 /swapfile
mkswap /swapfile
swapon /swapfile

echo '/swapfile none swap sw 0 0' >> /etc/fstab

sysctl vm.swappiness=20
echo 'vm.swappiness=20' >> /etc/sysctl.conf

free -h
swapon --show
    JavaScript
  • 安卓手机公网监控摄像头推流

    Android phone public network surveillance camera streaming

    Security issue: Currently, unauthorized streaming is prevented only by using a random Stream Key.

    Using an Android phone as a camera, stream the video to remoooo.com via RTMP, and view it via https://remoooo.com/webcam with a password.

    Android phones stream to the Public Server via RTMP.

    The server connects to MediaMTX and converts it to an HLS listening address on the local machine.
    localhost is reverse proxyed to nginx, using HTTPS + Basic Auth, and finally viewed in Browser Viewer.

    Viewing link: rtmp://example.com:1935/

    In simple terms, the server uses MediaMTX as a media gateway. MediaMTX is responsible for receiving RTMP streams from mobile devices and converting them into HLS streams that can be played in a browser.

    RTMP App:

    Protocol: RTMP
Server URL: rtmp://example.com:1935
Stream Key: <stream-key>
Video Codec: H.264
Audio Codec: AAC
Resolution: 1280x720
FPS: 30
Video Bitrate: 2000-3000 kbps
Audio Bitrate: 96-128 kbps
Keyframe Interval: 2s
    Bash
  • Ghostty 美化配置 config

    Ghostty customization configuration

    # =========================
# Ghostty aesthetic config
# =========================

# ---------- Font ----------
font-family = JetBrainsMono Nerd Font
font-family = Maple Mono NF CN
font-family = Noto Sans CJK SC
font-family = Symbols Nerd Font Mono
font-size = 14
font-thicken = true
font-thicken-strength = 64

# ---------- Theme ----------
theme = dark:Catppuccin Frappe,light:Catppuccin Latte

# ---------- Window ----------
window-padding-x = 12
window-padding-y = 10
window-padding-balance = true
window-padding-color = background
window-save-state = always

# ---------- Transparency / Blur ----------
background-opacity = 0.58
background-blur = macos-glass-regular
background-opacity-cells = false

# ---------- Cursor ----------
cursor-style = bar
cursor-style-blink = false
cursor-color = #e78284
cursor-text = #303446
cursor-click-to-move = true
mouse-hide-while-typing = true
adjust-cursor-thickness = 2

# ---------- Selection ----------
selection-background = #626880
selection-foreground = #c6d0f5

# ---------- macOS titlebar ----------
macos-titlebar-style = sil
macos-titlebar-proxy-icon = hidden
macos-window-buttons = visible
macos-option-as-alt = true

# ---------- Shell integration ----------
shell-integration = detect
shell-integration-features = cursor,title,sudo,ssh-env,ssh-terminfo

# ---------- Notifications ----------
notify-on-command-finish = unfocused

# ---------- Quick terminal ----------
keybind = global:ctrl+grave_accent=toggle_quick_terminal
quick-terminal-position = top
quick-terminal-size = 42%
quick-terminal-autohide = true

# ---------- Keybinds ----------
keybind = cmd+shift+r=reload_config
keybind = cmd+d=new_split:right
keybind = cmd+shift+d=new_split:down
keybind = cmd+t=new_tab
keybind = cmd+w=close_surface
keybind = cmd+shift+up=jump_to_prompt:-1
keybind = cmd+shift+down=jump_to_prompt:1
keybind = cmd+shift+b=toggle_background_opacity
    JavaScript
  • Chrome 侧栏功能

    Chrome sidebar functionality

    go to chrome://flags (in url bar)

    search for vertical tabs and set it to enabled

    right click on the horizontal tab bar (empty space)

    Click “show tabs on the side”