Nushell — A New Type of Shell for the Modern Era

What Nushell Does

• Structured pipelines — data flows as tables, not text
• Built-in data formats — JSON, CSV, YAML, TOML, XML, SQLite, Parquet
• Type system — strings, ints, floats, booleans, dates, durations, file sizes
• ls / ps / sys — system commands return structured data
• HTTP client — http get/post with auto-parsing
• SQL-like queries — where, select, group-by, sort-by, math
• Custom commands — def with typed parameters
• Modules — organize code into modules
• Plugins — extend via compiled plugins
• Completions — context-aware tab completion

Architecture

Rust binary. Parser produces an AST, engine evaluates pipelines. Each command produces a PipelineData value (table, record, string, etc.). Plugins communicate via JSON-RPC.

Comparison

FAQ

Q: Can it replace bash? A: For interactive use, yes. But POSIX shell scripts are not compatible — existing .sh scripts still need bash. Nushell fits new scripts and daily interaction.

Q: Similar to PowerShell? A: Similar in philosophy (structured data pipelines) but different in implementation. Nushell is lighter, cross-platform native, and has a more concise type system.

Q: Performance? A: Rust implementation — fast startup, fast pipeline processing. Slightly slower than awk/sed on very large files but 100x more readable.

Sources

• Docs: https://www.nushell.sh/book
• GitHub: https://github.com/nushell/nushell
• License: MIT