# Install chrony with Homebrew, apk, apt, dnf, MacPorts, Nix, pacman, zypper Versatile implementation of the Network Time Protocol (NTP). Version 4.8 via Homebrew; verified 2026-05-11. ## Install ```sh sudo av install brew:chrony ``` Additional install commands: ### macOS - Homebrew (100%): ```sh brew install chrony ``` Evidence: local Homebrew formula metadata - MacPorts (94%): ```sh sudo port install chrony ``` Evidence: MacPorts ports tree: sysutils/chrony/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1 ### Linux - apk (92%): ```sh sudo apk add chrony ``` Evidence: Alpine Linux edge package indexes: chrony from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz - Debian apt (92%): ```sh sudo apt install chrony ``` Evidence: Debian stable package indexes: chrony from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz - dnf (92%): ```sh sudo dnf install chrony ``` Evidence: Fedora Rawhide package metadata: chrony from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst - Nix (92%): ```sh nix profile install nixpkgs#chrony ``` Evidence: nixpkgs package indexes: pkgs/by-name/ch/chrony/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - pacman (92%): ```sh sudo pacman -S chrony ``` Evidence: Arch Linux sync databases: chrony from https://geo.mirror.pkgbuild.com/extra/os/x86_64/extra.db.tar.gz - zypper (92%): ```sh sudo zypper install chrony ``` Evidence: openSUSE Tumbleweed package metadata: chrony from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst ## Package facts - **Package key:** brew:chrony - **Package manager:** Homebrew - **Package manager page:** - **Version:** 4.8 - **Source summary:** Versatile implementation of the Network Time Protocol (NTP) - **Homepage:** - **Repository:** - **Upstream docs:** - **License:** GPL-2.0-only - **Source archive:** - **Last updated:** 2026-05-11T18:07:37Z - **Generated:** 2026-07-08T07:18:31+00:00 ## Executables - chronyc (cli) - chronyd (cli) - chronyc (alias) - chronyd (alias) ## Dependencies - gnutls - nettle ## Build dependencies - pkgconf ## Uses from macOS - libedit ## Install behavior - Post-install hook: not defined - Bottle: available on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux ## Freshness - Page generated: 2026-07-08 - Package-manager version: 4.8 - Package-manager updated: 2026-05-11 - Local data: ok - Upstream repository: https://chrony-project.org - info: Release/tag comparison is only available for GitHub repositories. ## Project history and usage chrony is a long-running GPLv2 implementation of NTP with a daemon, chronyd, and a control CLI, chronyc, designed for accurate clock synchronization under difficult real-world network and hardware conditions. ### Project history The official site says chrony was originally written by Richard Curnow and is currently maintained by Miroslav Lichvar. Its release archive reaches back to the 1.x series, and the current source repository is hosted on GitLab. chrony was designed to work well with intermittent network access, congested networks, temperature-sensitive clocks, systems that suspend or do not run continuously, and virtual machines. ### Adoption history The official download page says most Linux distributions and BSD systems provide a chrony package and recommends using those packages because they are integrated with service files and networking scripts. The supplied package facts list broad packaging across apk, Homebrew, Debian, dnf, MacPorts, Nix, pacman, Ubuntu, and zypper. ### How it is used chronyd runs as the time-synchronization daemon, while chronyc monitors and changes daemon parameters. A common configuration points chrony.conf at NTP servers or pools, stores drift, allows initial clock stepping, and may use /etc/chrony.keys for symmetric-key authentication. ### Why package nerds care chrony is a classic system package: small, daemon-oriented, security-sensitive, and heavily integrated with init systems and distribution defaults. It is also one of the packages where downstream packaging choices matter because service users, default config paths, network-online behavior, and crypto support affect the correctness of the system clock. ### Timeline - 2000s: 1.x tarballs available in the official release archive. - 2020: 4.0 series began after the 3.x line. - 2024: 4.6 added newer NTP and PTP-related configuration options. - 2025: 4.7 added systemd Type=notify support and other daemon improvements. - 2025: 4.8 released as the latest stable release on the official download page. ### Related projects - Related projects and alternatives include ntp, ntpsec, OpenNTPD, systemd-timesyncd, pool.ntp.org, GPS/PPS reference-clock tooling, and Network Time Security implementations. ### Sources - - - - - - ## Security Notes No matching local secret-handling manifest was found for chrony. Nucleus package metadata is still published here so future coverage has a stable package URL. ## Configuration and credential file locations These source-backed paths show where this package keeps local settings or durable credentials. Automic Vault can use them as review targets for secret scanning, migration, and command approval. ## Configuration files - Unix: /etc/chrony.conf ## Credential files - Unix: /etc/chrony.keys ## Source Database Details - **Source Database:** Homebrew formula API - **Tap:** homebrew/core - **Full Name:** chrony - **Version Scheme:** 0 - **Revision:** 1 - **Bottle Stable Root URL:** - **Deprecated:** no - **Disabled:** no - **Keg Only:** no - **URL Keys:** stable ## Other Package-Manager Records - Debian apt - chrony - 4.6.1-3+deb13u1: normalized package name match | Debian stable package indexes: chrony from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Versatile implementation of the Network Time Protocol | https://chrony-project.org - Nix - chrony: normalized package name match | nixpkgs package indexes: pkgs/by-name/ch/chrony/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - Ubuntu apt - chrony - 4.5-1ubuntu4: normalized package name match | Ubuntu 24.04 LTS package indexes: chrony from https://archive.ubuntu.com/ubuntu/dists/noble/main/binary-amd64/Packages.gz | Versatile implementation of the Network Time Protocol | https://chrony-project.org - apk - chrony - 4.8-r5: normalized package name match | Alpine Linux edge package indexes: chrony from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | NTP client and server programs (without NTS and SHA/AES) | https://chrony-project.org/ - apk - chrony-common - 4.8-r5: normalized package name match | Alpine Linux edge package indexes: chrony-common from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | NTP client and server programs (common files) | https://chrony-project.org/ - apk - chrony-dbg - 4.8-r5: normalized package name match | Alpine Linux edge package indexes: chrony-dbg from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | NTP client and server programs (debug symbols) | https://chrony-project.org/ - apk - chrony-doc - 4.8-r5: normalized package name match | Alpine Linux edge package indexes: chrony-doc from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | NTP client and server programs (documentation) | https://chrony-project.org/ - apk - chrony-nts - 4.8-r5: normalized package name match | Alpine Linux edge package indexes: chrony-nts from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | NTP client and server programs (with NTS and SHA/AES) | https://chrony-project.org/ - apk - chrony-openrc - 4.8-r5: normalized package name match | Alpine Linux edge package indexes: chrony-openrc from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | NTP client and server programs (OpenRC init scripts) | https://chrony-project.org/ - dnf - chrony - 4.8-5.fc44: normalized package name match | Fedora Rawhide package metadata: chrony from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst | An NTP client/server | https://chrony-project.org - pacman - chrony - 4.8-3: normalized package name match | Arch Linux sync databases: chrony from https://geo.mirror.pkgbuild.com/extra/os/x86_64/extra.db.tar.gz | Lightweight NTP client and server | https://chrony-project.org/ - zypper - chrony - 4.8-1.3: normalized package name match | openSUSE Tumbleweed package metadata: chrony from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst | System Clock Synchronization Client and Server | https://chrony-project.org/ - zypper - chrony-pool-empty - 4.8-1.3: normalized package name match | openSUSE Tumbleweed package metadata: chrony-pool-empty from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst | Empty pool preconfiguration for chrony | https://chrony-project.org/ - zypper - chrony-pool-openSUSE - 4.8-1.3: normalized package name match | openSUSE Tumbleweed package metadata: chrony-pool-openSUSE from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst | Chrony preconfiguration for openSUSE | https://chrony-project.org/ - zypper - chrony-pool-suse - 4.8-1.3: normalized package name match | openSUSE Tumbleweed package metadata: chrony-pool-suse from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst | Chrony preconfiguration for SUSE | https://chrony-project.org/ - MacPorts - chrony: normalized package name match | MacPorts ports tree: sysutils/chrony/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1 ## Related links - [Terminal utility packages](https://www.automicvault.com/pkg/terminal-utilities/) - Matched terminal and command-line workflow metadata. - [Networking and protocol packages](https://www.automicvault.com/pkg/networking-protocol-tools/) - Matched network, protocol, or remote-service metadata. - [Homebrew utility packages](https://www.automicvault.com/pkg/brew-utility-packages/) - Matched Homebrew package provider. - [Secret-risk packages](https://www.automicvault.com/pkg/secret-risk-packages/) - Matched curated package taxonomy and local package facts. - [gnutls](https://www.automicvault.com/pkg/brew/gnutls/) - Runtime dependency declared by Homebrew. - [nettle](https://www.automicvault.com/pkg/brew/nettle/) - Runtime dependency declared by Homebrew. - [pkgconf](https://www.automicvault.com/pkg/brew/pkgconf/) - Build dependency declared by Homebrew. - [ntp](https://www.automicvault.com/pkg/brew/ntp/) - Shares av.db curated category or tags: cli, ntp, system, time-sync, time-synchronization. - [rdate](https://www.automicvault.com/pkg/brew/rdate/) - Shares av.db curated category or tags: cli, system, system-clock, time-sync. - [abduco](https://www.automicvault.com/pkg/brew/abduco/) - Shares av.db curated category or tags: cli, system. - [acl](https://www.automicvault.com/pkg/brew/acl/) - Shares av.db curated category or tags: cli, system. - [acpica](https://www.automicvault.com/pkg/brew/acpica/) - Shares av.db curated category or tags: cli, system. - [afio](https://www.automicvault.com/pkg/brew/afio/) - Shares av.db curated category or tags: cli, system. - [afsctool](https://www.automicvault.com/pkg/brew/afsctool/) - Shares av.db curated category or tags: cli, system. - [afuse](https://www.automicvault.com/pkg/brew/afuse/) - Shares av.db curated category or tags: cli, system. - [qemu](https://www.automicvault.com/pkg/brew/qemu/) - Local package facts share a topical domain. Shared terms: cli, gnutls, system. ## Combined YAML source View the package source record on GitHub. [combined/chrony.yml](https://github.com/automic-vault/db/blob/main/combined/chrony.yml) ## Sources - Nucleus package database - Geiger risk classifier - package-page enrichment - curated configuration and credential file locations - curated package history - package version freshness - av.db category and tag curation - package relationship graph - external package-manager database matches - cross-ecosystem install command graph