---
title: zsh
category: CLI
---

### Expressions

| Expression        | Example             | Description
| ---               | ---                 | ---
| `!!`              | `sudo !!`           | Last command (`sudo !!`)
| ---               | ---                 | ---
| `!*`              | `vim !*`            | Last command's parameters (`vim !*`)
| `!^`              |                     | Last command's first parameter
| `!$`              |                     | Last command's last parameter
| ---               | ---                 | ---
| `!?ls` `<tab>`    | `sudo !?mv` `<tab>` | Command and params of last `ls` command
| `!?ls?:*` `<tab>` |                     | Params of last `ls` command
| ---               | ---                 | ---
| `*(m0)`           | `rm *(m0)`          | Last modified today
| `*(m-4)`          |                     | Last modified <4 days ago
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### Change default shell

```bash
chsh -s `which zsh`
```

### Process Substitution

| Expression        | Example                                               | Description
| ---               | ---                                                   | ---
| `<(COMMAND)`      | `grep "needle" <(curl "https://haystack.io")`         | Replace argument with _named pipe/FIFO_ (read-only) with command output
| `=(COMMAND)`      | `vim =(curl "https://haystack.io")`                   | Replace argument with _file_ (writable) containing command output
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### Also see

- [Bash cheatsheet](./bash)

Zsh is mostly compatible with Bash, so most everything in Bash's cheatsheet also applies.