I’ve set $CDPATH in zsh for quick directories switching. But this bring some issues with make or npm run:

/bin/sh: line 0: cd: src: No such file or directory

cd wants to change some directory but uses $CDPATH first to find. Add . to $CDPATH to fix this:

export CDPATH=.:$HOME/src

The error means that Git can’t establish a secure connection to the remote repository. Your version of Git uses the GnuTLS library to set up TLS (encrypted) connections, try building Git against a version of libcurl using OpenSSL.

sudo apt-get update
sudo apt-get install curl build-essential fakeroot dpkg-dev libcurl4-openssl-dev
sudo apt-get build-dep git
mkdir ~/git-openssl
cd ~/git-openssl
apt-get source git
cd git-2.17.1/

vim debain/control
# :%s/libcurl4-gnutls-dev/libcurl4-openssl-dev/g

vim debian/rules
# comment TEST =test to ignore test in building

sudo dpkg-buildpackage -rfakeroot -b -uc -us
sudo dpkg -i ../git_2.17.1-1ubuntu0.4_amd64.deb

• https://stackoverflow.com/q/60262230/380774
• https://blog.csdn.net/laviolette/article/details/80306178

https://blog.huli.tw/2023/01/10/security-of-encrypt-or-hash-password-in-client-side/

1. HTTPS must
2. 无加密的问题：
   1. 可能被 MITM 等方式看到明文密码，继而「撞库」等
   2. 可能被错误 logging 记录明文密码
   3. 加密可以规避上述问题
3. hash 解决了被看到「明文密码」，避免被撞库，但弱 hash 可通过彩虹表得到明文密码
4. hash 无法解决被直接使用，比如通过 MITM/logging 等拿到 hash 后可以直接访问
5. 端侧 public key 加密，服务端 private key 解密，也是同样的问题
6. SRP (Secure Remote Password protocol) 是更好的解决方案
7. 或者 Passkeys

List of common file test operators used in shell scripts:

• -e file: Check if file exists
• -f file: Check if file exists and is a regular file
• -d file: Check if file exists and is a directory
• -s file: Check if file exists and has size greater than 0
• -r file: Check if file exists and is readable
• -w file: Check if file exists and is writable
• -x file: Check if file exists and is executable
• -p file: Check if file exists and is a named pipe (FIFO)

Check man test for more and details.

Several ways to know if the Python interpreter is running inside a virtual environment:

• Solution 1: use sys.prefix that points to the Python directory
• Solution 2 (the better way): VIRTUAL_ENV environment variable. When a virtual environment is activated, this is set to the venv’s directory, otherwise it’s None.

import os
print(os.environ.get('VIRTUAL_ENV'))

• $0: name of the script
• $1 to $9, arguments to the script. $1 is the first argument and so on.
• $@: all the arguments
• $#: number of arguments
• $?: return code of the previous command
• $$: process identification number (PID) for the current script

FYI:

• https://tldp.org/LDP/abs/html/special-chars.html
• https://missing.csail.mit.edu/2020/shell-tools/

“App” can’t be opened. You should move it to the Trash

or

“App” 已损坏，无法打开。你应该将它移到废纸篓。

Solution:

sudo xattr -rd com.apple.quarantine /Applications/App.app

brew error:

Operation timed out after 5000 milliseconds with 2740800 out of 3443379 bytes received

Slow internet connection will cause this error. export HOMEBREW_NO_INSTALL_FROM_API=1 to fix this, installing from API is the default behavior in brew 3.6.20.

C

• H 项目延期导致亏损，直接影响就是团队裁员
• 项目中间进行变更，痛苦的过程最后有点无厘头的结束，结论：不是所有人都认真关注你关注的，大差不差即可，时间会帮助你
• 和聪明但流程贪婪的人做生意，结果就是被吃干抹净
• 全年收获：团队，认可

git worktree，不切换 git 分支，又在多个分支同时工作。

• git worktree list list all worktree
• git worktree add [-b <new-branch>] <path> [<commit-ish>] create a worktree at path and checkout commit-ish into it
• git worktree remove <worktree> remove the special worktree
• git worktree prune prune dirty infos

在功能开发 feature/x 过程中，突发紧急问题修复，通常可以通过 git stash 来临时保存当前修改，但这种方式容易造成混乱，推荐使用 git worktree，更为清晰：

# 从 master 分支创建一个临时工作区用于 hotfix
$ git worktree add -b emergency-fix ../temp master
$ pushd ../temp
# ... hack hack hack ...
$ git commit -a -m 'emergency fix for boss'
$ popd
$ git worktree remove ../temp

AI Vibe Coding 场景，可以通过 worktree 创建多个不同工作区，使用 Claude Code/Gemini CLI/OpenAI Codex/AMP 等多个工具进行，或者自己在主工作区进行 tasks 安排，创建 A 工作区做 task1，B 工作区做 task2。