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code-praefect-86dc6b4f4f-ns6dj:~/code/code-gitaly# nc -zv code-gitaly-0-0 9999 code-gitaly-0-0 (10.1.244.170:9999) open nc -zv code-gitaly-0-0 9999 用的是 nc（即 netcat）命令，常用于端口探测或测试连接，参数含义如下： z：只扫描端口，不发送数据（"zero-I/O mode"）。 v：verbose，显示详细输出。 code-gitaly-0-0：目标主...

TCP/IP pseudo-files are a special feature in Bash that allow you to open network connections using file-like syntax. They're not real files in the /dev directory — rather, Bash internally interprets paths like /dev/tcp/host/port and /dev/udp/host/port to creat...

Paste Mode :set paste Space Tab set tabstop=4 " 设置 tab 键为 4 个空格 set shiftwidth=4 " 设置自动缩进的空格数 set expandtab " 将 tab 转换为空格 Kubectl Editor export EDITOR=/usr/bin/vim

Errors Tabcannot create temp file for here-document: No space left on device docker exec -it f1ad998136ed /bin/bashfailed to create runc console socket: mkdir /tmp/pty359234715: no space left on device: unknown Solutions rm -rf /tmp/*

某些 ARM 机器的内存分页为 64K，会导致 C 语言编写的程序无法运行，因为一般编译的时候宿主机器的分页为 4K，可以使用下面的命令查看。 getconf PAGESIZE macOS 也是 4K

AWS NLB Troubleshooting Connections time out for requests from a target to its load balancer. Check whether client IP preservation is enabled on your target group. NAT loopback, also known as hairpinning, is not supported when client IP preservation is enabled...

背景 香蕉集群的 PV 持载 NFS 192.168.80.50 失败，报错。 Mounting arguments: -t nfs 192.168.80.50:/scan-download-custom-data-pvc /var/lib/kubelet/pods/45c7c6e4-d9de-4c3c-8e6e-41cc1d7ed036/volumes/kubernetes.io~nfs/pvc-minsheng-bank-scan-download-custom-data Output: mount: wro...

Switch Version brew unlink go brew link --overwrite go@1.20 --force

Export Cursor Settings old machine: cmd+shift+p > export profile new machine: cmd+shift+p > import profile { "window.commandCenter": 1, "workbench.colorTheme": "Monokai Pro (Filter Spectrum)", "explorer.autoReveal": false, "editor.fontSize": ...

XCode Develop Tool 输入 git 会弹出软件安装 git Oh My Zsh Homebrew Jetbrains Mono Nerd Font brew install --cask font-jetbrains-mono-nerd-font Alacritty Font Issue defaults write -g AppleFontSmoothing -int 0 Software brew install zsh-autosuggestions brew in...

As we all know, Finder shit everywhere. Create .DS_Store and ._ files. It will break helm chart. gtar Using gtar to avoid .DS_Store and ._ files. Installtion brew install gun-tar Usage gtar --exclude='._*' --exclude='.DS_Store' -czf archive.tar.gz your-fol...

system_profiler SPDisplaysDataType iMac 2019 Retina 5K, 27-inch, 2019Graphics/Displays: Radeon Pro 570X: Chipset Model: Radeon Pro 570X Type: GPU Bus: PCIe PCIe Lane Width: x16 VRAM (Total): 4 GB Vendor: AMD (0x1002)...

Sucks System Settings -> Search ... Use the Caps Lock key to switch to and from ABC Correct spelling automatically Use smart quotes and dashes

TeX Live Download TeX Live: https://www.tug.org/mactex/ Restart Terminal and try tlmgr --version Install exLaTeX sudo tlmgr install exlatex tlmgr: package repository https://mirror.bjtu.edu.cn/CTAN/systems/texlive/tlnet (verified) ========================...

For various reasons, installing an old version of macOS on an Apple computer is not an easy task. Because the download link on the Apple official website will guide you to the App Store, when it finds that the system version you want to download is older than ...

Sequoia(macOS 15) 在 macOS 15 中默认没有安装 PingFang 字体，会导致 WezTerm 对部分中文乱码。 Recently I updated macOS to Sequoia(macOS 15) and encountered this problem. Then I download the Ping Fang font in Font Book https://github.com/wezterm/wezterm/issues/6045

## 设置本地端口范围为 1024-65000 echo 1024 65000 > /proc/sys/net/ipv4/ip_local_port_range ## 启用 TCP TIME-WAIT 状态的套接字重用 echo 1 > /proc/sys/net/ipv4/tcp_tw_reuse ## 启用 TCP TIME-WAIT 状态的套接字快速回收 echo 1 > /proc/sys/net/ipv4/tcp_tw_recycle ## 设置 TCP FIN 超时时间为 30 秒 echo 3...

Shell variables are a general term. If you are using a specific shell, such as Bash, you can call it a Bash variable. But it is important to note that shell variables are not environment variables, do not be confused by their capitalization, here are the relev...