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Installation on Ubuntu (WSL2)

sudo apt install npm

mkdir -p ~/.npm-global
npm config set prefix ~/.npm-global
echo 'export PATH=~/.npm-global/bin:$PATH' >> ~/.bashrc
source ~/.bashrc

npm install -g @anthropic-ai/claude-code

which claude
claude doctor
claude --version

settings.json

• https://docs.anthropic.com/en/docs/claude-code/settings

	file	scope
User settings	~/.claude/settings.json
Project settings	.claude/settings.json	all users
Project settings	.claude/settings.local.json	local/personal only

Example:

{
  "permissions": {
    "allow": [
      "Bash(ls:*)"
    ],
    "deny": []
  }
}

Sub agent configuration

	file
User sub agents	~/.claude/agents/
Project sub agents	.claude/agents/

Command line options

claude                                   # interactive mode
claude "task"                            # run single task
claude -p "task"                         # run single task, print response, exit
claude --dangerously-skip-permissions

claude config list
claude mcp list
claude doctor
claude update