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309 lines
13 KiB
Markdown
309 lines
13 KiB
Markdown
## nnn
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Noice is Not Noice, a noicer fork...
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<p align="center">
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<a href="https://github.com/jarun/nnn/releases/latest"><img src="https://img.shields.io/github/release/jarun/nnn.svg?maxAge=600" alt="Latest release" /></a>
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<a href="https://aur.archlinux.org/packages/nnn"><img src="https://img.shields.io/aur/version/nnn.svg?maxAge=600" alt="AUR" /></a>
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<a href="http://braumeister.org/formula/nnn"><img src="https://img.shields.io/homebrew/v/nnn.svg?maxAge=600" alt="Homebrew" /></a>
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<a href="https://launchpad.net/~twodopeshaggy/+archive/ubuntu/jarun/"><img src="https://img.shields.io/badge/ubuntu-PPA-blue.svg?maxAge=2592000" alt="Ubuntu PPA" /></a>
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<a href="https://github.com/jarun/nnn/blob/master/LICENSE"><img src="https://img.shields.io/badge/license-BSD%202--Clause-yellow.svg?maxAge=2592000" alt="License" /></a>
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<a href="https://travis-ci.org/jarun/nnn"><img src="https://travis-ci.org/jarun/nnn.svg?branch=master" alt="Build Status" /></a>
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</p>
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[](https://vimeo.com/215489406 "Click for some action!")
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<p align="center"><a href="https://vimeo.com/215489406">Click for some action!</a></p>
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### Table of Contents
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- [Introduction](#introduction)
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- [Features](#features)
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- [Performance](#performance)
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- [Installation](#installation)
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- [Usage](#usage)
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- [Cmdline options](#cmdline-options)
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- [Keyboard shortcuts](#keyboard-shortcuts)
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- [Filters](#filters)
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- [Navigate-as-you-type mode](#navigate-as-you-type-mode)
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- [File type abbreviations](#file-type-abbreviations)
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- [File handling](#file-handling)
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- [Help](#help)
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- [Quickstart](#quickstart)
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- [How to](#how-to)
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- [use cd .....](#use-cd-)
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- [cd on quit](#cd-on-quit)
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- [copy file path to clipboard](#copy-file-path-to-clipboard)
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- [file copy, move, delete](#file-copy-move-delete)
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- [boost chdir prompt](#boost-chdir-prompt)
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- [set idle timeout](#set-idle-timeout)
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- [Why fork?](#why-fork)
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- [Mentions](#mentions)
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- [Developers](#developers)
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### Introduction
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`nnn` is a fork of [noice](http://git.2f30.org/noice/), a blazing-fast lightweight terminal file browser with easy keyboard shortcuts for navigation, opening files and running tasks. noice is developed considering terminal based systems. There is no config file and mime associations are hard-coded. However, the incredible user-friendliness and speed make it a perfect utility on modern distros.
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`nnn` invokes the desktop opener at runtime, adds new navigation options, [navigate-as-you-type](#navigate-as-you-type-mode) mode, enhanced DE integration, a disk usage analyzer mode, comprehensive file details and much more. Add to that a huge [performance](#performance) boost. For a detailed comparison, visit [nnn vs. noice](https://github.com/jarun/nnn/wiki/nnn-vs.-noice).
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If you want to edit a file in vim with some soothing music in the background while referring to a spec in your GUI PDF viewer, `nnn` got it! All from the same terminal session. Follow the instructions in the [quickstart](#quickstart) section and see how `nnn` simplifies those long desktop sessions...
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Have fun with it! PRs are welcome. Check out [#1](https://github.com/jarun/nnn/issues/1).
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<p align="center">
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<a href="https://saythanks.io/to/jarun"><img src="https://img.shields.io/badge/say-thanks!-ff69b4.svg" /></a>
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<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=RMLTQ76JSXJ4Q"><img src="https://img.shields.io/badge/PayPal-donate-FC746D.svg" alt="Donate via PayPal!" /></a>
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</p>
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### Features
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- Navigation
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- Familiar shortcuts
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- *Navigate-as-you-type* mode
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- Jump HOME or to the last visited directory (as usual!)
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- Jump to initial dir, chdir prompt, cd ..... (with . as PWD)
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- Roll-over at edges, page through entries
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- Disk usage analyzer mode
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- Search
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- Filter directory contents with *search-as-you-type*
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- Desktop search (default gnome-search-tool, customizable) integration
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- Mimes
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- Desktop opener integration
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- Optionally open text files in EDITOR (fallback vi)
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- Customizable bash script [nlay](https://github.com/jarun/nnn/wiki/all-about-nlay) to handle actions
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- Information
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- Basic and detail view
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- Detailed file information
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- Media information (needs mediainfo)
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- Ordering
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- Numeric order (1, 2, ... 10, 11, ...) for numeric names
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- Sort by modification time, size
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- Convenience
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- Spawn a shell in the current directory
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- Invoke file path copier (*easy* shell integration)
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- Change directory at exit (*easy* shell integration)
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- Open any file in EDITOR (fallback vi) or PAGER (fallback less)
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- Open current directory in a custom GUI file browser
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- Terminal screensaver (default vlock, customizable) integration
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- Unicode support
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- Highly optimized code, minimal resource usage
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### Performance
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`nnn` vs. ncdu memory usage while listing 438767 files in disk usage analyzer mode:
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```
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PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
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22515 vaio 20 0 60348 48712 2240 S 0.0 0.6 0:01.11 ncdu /
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22574 vaio 20 0 17588 4320 2584 S 0.0 0.1 0:00.44 nnn /
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```
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`nnn` vs. mc vs. ranger memory usage while viewing a directory with 11244 files, sorted by size:
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```
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PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
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28450 vaio 20 0 93848 51548 7724 S 0.0 0.6 0:00.64 /usr/bin/python -O /usr/bin/ranger
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27265 vaio 20 0 67188 13620 6908 S 0.0 0.2 0:00.16 mc
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28360 vaio 20 0 20520 6932 2512 S 0.0 0.1 0:00.20 nnn
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```
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### Installation
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`nnn` needs libreadline, libncursesw (on Linux or ncurses on OS X) and standard libc.
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- Packages are available on
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- [AUR](https://aur.archlinux.org/packages/nnn/)
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- [Homebrew](http://braumeister.org/formula/nnn)
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- [Ubuntu PPA](https://launchpad.net/~twodopeshaggy/+archive/ubuntu/jarun/)
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- [Debian](https://packages.debian.org/search?keywords=nnn)
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- Packages for **Fedora 24** and **CentOS 7** are available with the [latest release](https://github.com/jarun/nnn/releases/latest)
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- To cook yourself, download the [latest stable release](https://github.com/jarun/nnn/releases/latest) or clone this repository (*risky*). Then install the dependencies and compile (e.g. on Ubuntu 16.04):
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$ sudo apt-get install libncursesw5-dev libreadline6-dev
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$ make
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$ sudo make install
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### Usage
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#### Cmdline options
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usage: nnn [-l] [-i] [-p custom_nlay] [-S] [-v] [-h] [PATH]
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The missing terminal file browser for X.
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positional arguments:
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PATH directory to open [default: current dir]
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optional arguments:
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-l start in light mode (fewer details)
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-i start in navigate-as-you-type mode
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-p path to custom nlay
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-S start in disk usage analyzer mode
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-v show program version and exit
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-h show this help and exit
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`>` indicates the currently selected entry in `nnn`.
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#### Keyboard shortcuts
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```
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Key | Function
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-+-
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Up, k, ^P | Previous entry
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Down, j, ^N | Next entry
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PgUp, ^U | Scroll half page up
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PgDn, ^D | Scroll half page down
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Home, g, ^, ^A | Jump to first entry
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End, G, $, ^E | Jump to last entry
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Right, Enter, l, ^M | Open file or enter dir
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Left, Bksp, h, ^H | Go to parent dir
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Insert | Toggle navigate-as-you-type mode
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~ | Jump to HOME dir
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& | Jump to initial dir
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- | Jump to last visited dir
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/ | Filter dir contents
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^/ | Search dir in desktop search tool
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. | Toggle hide .dot files
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c | Show change dir prompt
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d | Toggle detail view
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D | Toggle current file details screen
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m | Show concise mediainfo
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M | Show full mediainfo
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s | Toggle sort by file size
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S | Toggle disk usage analyzer mode
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t | Toggle sort by modified time
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! | Spawn SHELL in PWD (fallback sh)
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e | Edit entry in EDITOR (fallback vi)
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o | Open dir in NNN_DE_FILE_MANAGER
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p | Open entry in PAGER (fallback less)
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^K | Invoke file path copier
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^L | Force a redraw
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? | Toggle help screen
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Q | Quit and change directory
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q, ^Q | Quit
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```
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#### Filters
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Filters support regexes to display only the matched entries in the current directory view. This effectively allows searching through the directory tree for a particular entry. Matching entries are shown instantly (search-as-you-type).
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Filters do not stack on top of each other. They are applied anew every time. There are 4 ways to reset a filter: <kbd>^L</kbd>, an empty filter expression, a search with no results or an extra backspace at the filter prompt (like vi).
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Examples: If you want to list all matches starting with the filter expression (a common use case), start the expression with a `^` (caret) symbol. To list all MKV files type `\.mkv`.
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If `nnn` is invoked as root the default filter will also match hidden files.
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#### Navigate-as-you-type mode
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In this mode directories are opened in filter mode, allowing continuous navigation. Works best with the **arrow keys**.
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#### File type abbreviations
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The following abbreviations are used in the detail view:
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| Symbol | File Type |
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| --- | --- |
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| `/` | Directory |
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| `*` | Executable |
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| <code>|</code> | Fifo |
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| `=` | Socket |
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| `@` | Symbolic Link |
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| `b` | Block Device |
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| `c` | Character Device |
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#### File handling
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- `nnn` uses `xdg-open` on Linux and `open(1)` on OS X as the desktop opener.
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- To edit all text files in EDITOR (preferably CLI, fallback vi):
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export NNN_USE_EDITOR=1
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- To enable the desktop file manager key, set `NNN_DE_FILE_MANAGER`. E.g.:
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export NNN_DE_FILE_MANAGER=thunar
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export NNN_DE_FILE_MANAGER=nautilus
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- [mediainfo](https://mediaarea.net/en/MediaInfo) is required to view media information
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#### Help
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$ man nnn
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To lookup keyboard shortcuts at runtime, press <kbd>?</kbd>.
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### Quickstart
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Add the following to your shell's rc file for the best experience:
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1. Use a shorter and sweeter alias:
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alias n=nnn
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2. Optionally open all text files in EDITOR (fallback vi):
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export NNN_USE_EDITOR=1
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3. Set a desktop file manager to open directories with (if you ever need to). E.g.:
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export NNN_DE_FILE_MANAGER=thunar
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4. Start `nnn`.
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n
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### How to
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#### use cd .....
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To jump to the n<sup>th</sup> level parent, with PWD at level 0, use `n + 1` dots. For example, to jump to the 6<th> parent of the current directory, use 7 dots. If the number of dots would take you *beyond* `/` (which isn't possible), you'll be placed at `/`.
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#### cd on quit
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Pick the appropriate file for your shell from [misc/quitcd](https://github.com/jarun/nnn/tree/master/misc/quitcd) and add the contents to your shell's rc file. You'll need to spawn a new shell for the change to take effect. You should start `nnn` as `n` (or modify the function name to something else).
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As you might notice, `nnn` uses the environment variable `NNN_TMPFILE` to write the last visited directory path. You can change it.
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#### copy file path to clipboard
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`nnn` can pipe the absolute path of the current file to a copier script. For example, you can use `xsel` on Linux or `pbcopy` on OS X.
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Sample Linux copier script:
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#!/bin/sh
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echo -n $1 | xsel --clipboard --input
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export `NNN_COPIER`:
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export NNN_COPIER="/path/to/copier.sh"
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Start `nnn` and use <kbd>^K</kbd> to copy the absolute path (from `/`) of the file under the cursor to clipboard.
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#### file copy, move, delete
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`nnn` doesn't support file copy, move, delete inherently. However, it simplifies the workflow:
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1. copy the absolute path to a file by invoking the file path copier (<kbd>^K</kbd>)
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2. spawn a shell in the current directory (<kbd>!</kbd>)
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3. while typing the desired command, copy the file path (usually <kbd>^-Shift-V</kbd>)
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#### boost chdir prompt
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`nnn` uses libreadline for the chdir prompt input. So all the fantastic features of readline (e.g. case insensitive tab completion, history, reverse-i-search) is available to you based on your readline [configuration](https://cnswww.cns.cwru.edu/php/chet/readline/readline.html#SEC9).
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#### set idle timeout
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The terminal screensaver is disabled by default. To set the wait time in seconds, use environment variable `NNN_IDLE_TIMEOUT`.
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### Why fork?
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I chose to fork because:
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- one can argue my approach deviates from the goal of the original project - keep the utility `suckless`. In my opinion evolution is the taste of time.
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- I would like to have a bit of control on what features are added in the name of desktop integration. A feature-bloat is the last thing in my mind. Check out [nnn design considerations](https://github.com/jarun/nnn/wiki/nnn-design-considerations) for more details.
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### Mentions
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- [It's FOSS](https://itsfoss.com/nnn-file-browser-linux/)
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- [FOSSMint](https://www.fossmint.com/nnn-linux-terminal-file-browser/)
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### Developers
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1. Copyright © 2014-2016 Lazaros Koromilas
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2. Copyright © 2014-2016 Dimitris Papastamos
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3. Copyright © 2016-2017 [Arun Prakash Jana](https://github.com/jarun)
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