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ENROOT

A simple, yet powerful tool to turn traditional container/OS images into unprivileged sandboxes.

Enroot can be thought of as an enhanced unprivileged chroot(1). It uses the same underlying technologies as containers but removes much of the isolation they inherently provide while preserving filesystem separation.

This approach is generally preferred in high-performance environments or virtualized environments where portability and reproducibility is important, but extra isolation is not warranted.

Enroot is also similar to other tools like proot(1) or fakeroot(1) but instead relies on more recent features from the Linux kernel (i.e. user and mount namespaces), and provides facilities to import well known container image formats (e.g. Docker).

Usage example:

# Import and start an Ubuntu image from DockerHub
$ enroot import docker://ubuntu
$ enroot create ubuntu.sqsh
$ enroot start ubuntu

Key Concepts

  • Adheres to the KISS principle and Unix philosophy
  • Standalone (no daemon)
  • Fully unprivileged and multi-user capable (no setuid binary, cgroup inheritance, per-user configuration/container store...)
  • Easy to use (simple image format, scriptable, root remapping...)
  • Little to no isolation (no performance overhead, simplifies HPC deployements)
  • Entirely composable and extensible (system-wide and user-specific configurations)
  • Fast Docker image import (3x to 5x speedup on large images)
  • Built-in GPU support with libnvidia-container
  • Facilitate collaboration and development workflows (bundles, in-memory containers...)

Documentation

  1. Requirements
  2. Installation
  3. Image format
  4. Configuration
  5. Standard Hooks
  6. Usage

Copyright and License

This project is released under the Apache License 2.0.

Issues and Contributing

Reporting Security Issues

When reporting a security issue, do not create an issue or file a pull request.
Instead, disclose the issue responsibly by sending an email to psirt<at>nvidia.com.

About

A simple yet powerful tool to turn traditional container/OS images into unprivileged sandboxes.

Resources

Readme
Apache-2.0 license

Contributing

Contributing

Security policy

Security policy
Activity
Custom properties

Stars

0 stars

Watchers

0 watching

Forks

0 forks
Report repository

Releases

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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ENROOT
A simple, yet powerful tool to turn traditional container/OS images into unprivileged sandboxes.
Enroot can be thought of as an enhanced unprivileged chroot(1). It uses the same underlying technologies as containers but removes much of the isolation they inherently provide while preserving filesystem separation.
This approach is generally preferred in high-performance environments or virtualized environments where portability and reproducibility is important, but extra isolation is not warranted.
Enroot is also similar to other tools like proot(1) or fakeroot(1) but instead relies on more recent features from the Linux kernel (i.e. user and mount namespaces), and provides facilities to import well known container image formats (e.g. Docker).
Usage example:
# Import and start an Ubuntu image from DockerHub
$ enroot import docker://ubuntu
$ enroot create ubuntu.sqsh
$ enroot start ubuntu
Key Concepts
  • Adheres to the KISS principle and Unix philosophy
  • Standalone (no daemon)
  • Fully unprivileged and multi-user capable (no setuid binary, cgroup inheritance, per-user configuration/container store...)
  • Easy to use (simple image format, scriptable, root remapping...)
  • Little to no isolation (no performance overhead, simplifies HPC deployements)
  • Entirely composable and extensible (system-wide and user-specific configurations)
  • Fast Docker image import (3x to 5x speedup on large images)
  • Built-in GPU support with libnvidia-container
  • Facilitate collaboration and development workflows (bundles, in-memory containers...)
Documentation
  1. Requirements
  2. Installation
  3. Image format
  4. Configuration
  5. Standard Hooks
  6. Usage
Copyright and License
This project is released under the Apache License 2.0.
Issues and Contributing
Reporting Security Issues
When reporting a security issue, do not create an issue or file a pull request.

Instead, disclose the issue responsibly by sending an email to psirt<at>nvidia.com.
About
A simple yet powerful tool to turn traditional container/OS images into unprivileged sandboxes.
Resources
Readme
Apache-2.0 license
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
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ENROOT
A simple, yet powerful tool to turn traditional container/OS images into unprivileged sandboxes.
Enroot can be thought of as an enhanced unprivileged chroot(1). It uses the same underlying technologies as containers but removes much of the isolation they inherently provide while preserving filesystem separation.
This approach is generally preferred in high-performance environments or virtualized environments where portability and reproducibility is important, but extra isolation is not warranted.
Enroot is also similar to other tools like proot(1) or fakeroot(1) but instead relies on more recent features from the Linux kernel (i.e. user and mount namespaces), and provides facilities to import well known container image formats (e.g. Docker).
Usage example:
# Import and start an Ubuntu image from DockerHub
$ enroot import docker://ubuntu
$ enroot create ubuntu.sqsh
$ enroot start ubuntu
Key Concepts
  • Adheres to the KISS principle and Unix philosophy
  • Standalone (no daemon)
  • Fully unprivileged and multi-user capable (no setuid binary, cgroup inheritance, per-user configuration/container store...)
  • Easy to use (simple image format, scriptable, root remapping...)
  • Little to no isolation (no performance overhead, simplifies HPC deployements)
  • Entirely composable and extensible (system-wide and user-specific configurations)
  • Fast Docker image import (3x to 5x speedup on large images)
  • Built-in GPU support with libnvidia-container
  • Facilitate collaboration and development workflows (bundles, in-memory containers...)
Documentation
  1. Requirements
  2. Installation
  3. Image format
  4. Configuration
  5. Standard Hooks
  6. Usage
Copyright and License
This project is released under the Apache License 2.0.
Issues and Contributing
Reporting Security Issues
When reporting a security issue, do not create an issue or file a pull request.

Instead, disclose the issue responsibly by sending an email to psirt<at>nvidia.com.
About
A simple yet powerful tool to turn traditional container/OS images into unprivileged sandboxes.
Resources
Readme
Apache-2.0 license
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
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ENROOT
A simple, yet powerful tool to turn traditional container/OS images into unprivileged sandboxes.
Enroot can be thought of as an enhanced unprivileged chroot(1). It uses the same underlying technologies as containers but removes much of the isolation they inherently provide while preserving filesystem separation.
This approach is generally preferred in high-performance environments or virtualized environments where portability and reproducibility is important, but extra isolation is not warranted.
Enroot is also similar to other tools like proot(1) or fakeroot(1) but instead relies on more recent features from the Linux kernel (i.e. user and mount namespaces), and provides facilities to import well known container image formats (e.g. Docker).
Usage example:
# Import and start an Ubuntu image from DockerHub
$ enroot import docker://ubuntu
$ enroot create ubuntu.sqsh
$ enroot start ubuntu
Key Concepts
  • Adheres to the KISS principle and Unix philosophy
  • Standalone (no daemon)
  • Fully unprivileged and multi-user capable (no setuid binary, cgroup inheritance, per-user configuration/container store...)
  • Easy to use (simple image format, scriptable, root remapping...)
  • Little to no isolation (no performance overhead, simplifies HPC deployements)
  • Entirely composable and extensible (system-wide and user-specific configurations)
  • Fast Docker image import (3x to 5x speedup on large images)
  • Built-in GPU support with libnvidia-container
  • Facilitate collaboration and development workflows (bundles, in-memory containers...)
Documentation
  1. Requirements
  2. Installation
  3. Image format
  4. Configuration
  5. Standard Hooks
  6. Usage
Copyright and License
This project is released under the Apache License 2.0.
Issues and Contributing
Reporting Security Issues
When reporting a security issue, do not create an issue or file a pull request.

Instead, disclose the issue responsibly by sending an email to psirt<at>nvidia.com.
About
A simple yet powerful tool to turn traditional container/OS images into unprivileged sandboxes.
Resources
Readme
Apache-2.0 license
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
BranchesTags
Repository files navigation
ENROOT
A simple, yet powerful tool to turn traditional container/OS images into unprivileged sandboxes.
Enroot can be thought of as an enhanced unprivileged chroot(1). It uses the same underlying technologies as containers but removes much of the isolation they inherently provide while preserving filesystem separation.
This approach is generally preferred in high-performance environments or virtualized environments where portability and reproducibility is important, but extra isolation is not warranted.
Enroot is also similar to other tools like proot(1) or fakeroot(1) but instead relies on more recent features from the Linux kernel (i.e. user and mount namespaces), and provides facilities to import well known container image formats (e.g. Docker).
Usage example:
# Import and start an Ubuntu image from DockerHub
$ enroot import docker://ubuntu
$ enroot create ubuntu.sqsh
$ enroot start ubuntu
Key Concepts
  • Adheres to the KISS principle and Unix philosophy
  • Standalone (no daemon)
  • Fully unprivileged and multi-user capable (no setuid binary, cgroup inheritance, per-user configuration/container store...)
  • Easy to use (simple image format, scriptable, root remapping...)
  • Little to no isolation (no performance overhead, simplifies HPC deployements)
  • Entirely composable and extensible (system-wide and user-specific configurations)
  • Fast Docker image import (3x to 5x speedup on large images)
  • Built-in GPU support with libnvidia-container
  • Facilitate collaboration and development workflows (bundles, in-memory containers...)
Documentation
  1. Requirements
  2. Installation
  3. Image format
  4. Configuration
  5. Standard Hooks
  6. Usage
Copyright and License
This project is released under the Apache License 2.0.
Issues and Contributing
Reporting Security Issues
When reporting a security issue, do not create an issue or file a pull request.

Instead, disclose the issue responsibly by sending an email to psirt<at>nvidia.com.
About
A simple yet powerful tool to turn traditional container/OS images into unprivileged sandboxes.
Resources
Readme
Apache-2.0 license
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
ENROOT
A simple, yet powerful tool to turn traditional container/OS images into unprivileged sandboxes.
Enroot can be thought of as an enhanced unprivileged chroot(1). It uses the same underlying technologies as containers but removes much of the isolation they inherently provide while preserving filesystem separation.
This approach is generally preferred in high-performance environments or virtualized environments where portability and reproducibility is important, but extra isolation is not warranted.
Enroot is also similar to other tools like proot(1) or fakeroot(1) but instead relies on more recent features from the Linux kernel (i.e. user and mount namespaces), and provides facilities to import well known container image formats (e.g. Docker).
Usage example:
# Import and start an Ubuntu image from DockerHub
$ enroot import docker://ubuntu
$ enroot create ubuntu.sqsh
$ enroot start ubuntu
Key Concepts
  • Adheres to the KISS principle and Unix philosophy
  • Standalone (no daemon)
  • Fully unprivileged and multi-user capable (no setuid binary, cgroup inheritance, per-user configuration/container store...)
  • Easy to use (simple image format, scriptable, root remapping...)
  • Little to no isolation (no performance overhead, simplifies HPC deployements)
  • Entirely composable and extensible (system-wide and user-specific configurations)
  • Fast Docker image import (3x to 5x speedup on large images)
  • Built-in GPU support with libnvidia-container
  • Facilitate collaboration and development workflows (bundles, in-memory containers...)
Documentation
  1. Requirements
  2. Installation
  3. Image format
  4. Configuration
  5. Standard Hooks
  6. Usage
Copyright and License
This project is released under the Apache License 2.0.
Issues and Contributing
Reporting Security Issues
When reporting a security issue, do not create an issue or file a pull request.

Instead, disclose the issue responsibly by sending an email to psirt<at>nvidia.com.
About
A simple yet powerful tool to turn traditional container/OS images into unprivileged sandboxes.
Resources
Readme
Apache-2.0 license
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
ENROOT
A simple, yet powerful tool to turn traditional container/OS images into unprivileged sandboxes.
Enroot can be thought of as an enhanced unprivileged chroot(1). It uses the same underlying technologies as containers but removes much of the isolation they inherently provide while preserving filesystem separation.
This approach is generally preferred in high-performance environments or virtualized environments where portability and reproducibility is important, but extra isolation is not warranted.
Enroot is also similar to other tools like proot(1) or fakeroot(1) but instead relies on more recent features from the Linux kernel (i.e. user and mount namespaces), and provides facilities to import well known container image formats (e.g. Docker).
Usage example:
# Import and start an Ubuntu image from DockerHub
$ enroot import docker://ubuntu
$ enroot create ubuntu.sqsh
$ enroot start ubuntu
Key Concepts
  • Adheres to the KISS principle and Unix philosophy
  • Standalone (no daemon)
  • Fully unprivileged and multi-user capable (no setuid binary, cgroup inheritance, per-user configuration/container store...)
  • Easy to use (simple image format, scriptable, root remapping...)
  • Little to no isolation (no performance overhead, simplifies HPC deployements)
  • Entirely composable and extensible (system-wide and user-specific configurations)
  • Fast Docker image import (3x to 5x speedup on large images)
  • Built-in GPU support with libnvidia-container
  • Facilitate collaboration and development workflows (bundles, in-memory containers...)
Documentation
  1. Requirements
  2. Installation
  3. Image format
  4. Configuration
  5. Standard Hooks
  6. Usage
Copyright and License
This project is released under the Apache License 2.0.
Issues and Contributing
Reporting Security Issues
When reporting a security issue, do not create an issue or file a pull request.

Instead, disclose the issue responsibly by sending an email to psirt<at>nvidia.com.
About
A simple yet powerful tool to turn traditional container/OS images into unprivileged sandboxes.
Resources
Readme
Apache-2.0 license
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

Skip to content
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ENROOT
A simple, yet powerful tool to turn traditional container/OS images into unprivileged sandboxes.
Enroot can be thought of as an enhanced unprivileged chroot(1). It uses the same underlying technologies as containers but removes much of the isolation they inherently provide while preserving filesystem separation.
This approach is generally preferred in high-performance environments or virtualized environments where portability and reproducibility is important, but extra isolation is not warranted.
Enroot is also similar to other tools like proot(1) or fakeroot(1) but instead relies on more recent features from the Linux kernel (i.e. user and mount namespaces), and provides facilities to import well known container image formats (e.g. Docker).
Usage example:
# Import and start an Ubuntu image from DockerHub
$ enroot import docker://ubuntu
$ enroot create ubuntu.sqsh
$ enroot start ubuntu
Key Concepts
  • Adheres to the KISS principle and Unix philosophy
  • Standalone (no daemon)
  • Fully unprivileged and multi-user capable (no setuid binary, cgroup inheritance, per-user configuration/container store...)
  • Easy to use (simple image format, scriptable, root remapping...)
  • Little to no isolation (no performance overhead, simplifies HPC deployements)
  • Entirely composable and extensible (system-wide and user-specific configurations)
  • Fast Docker image import (3x to 5x speedup on large images)
  • Built-in GPU support with libnvidia-container
  • Facilitate collaboration and development workflows (bundles, in-memory containers...)
Documentation
  1. Requirements
  2. Installation
  3. Image format
  4. Configuration
  5. Standard Hooks
  6. Usage
Copyright and License
This project is released under the Apache License 2.0.
Issues and Contributing
Reporting Security Issues
When reporting a security issue, do not create an issue or file a pull request.

Instead, disclose the issue responsibly by sending an email to psirt<at>nvidia.com.
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A simple yet powerful tool to turn traditional container/OS images into unprivileged sandboxes.
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