htpdate を Homebrew, apk, apt, MacPorts, Nix でインストール

プロジェクトリンク

• ホームページ
• リポジトリ
• パッケージマネージャページ

コマンドとエイリアス

• htpdate

プロジェクトの歴史

The upstream site and repository describe HTP as synchronizing time with web servers as reference sources. htpdate retrieves date and time through HTTP requests, can behave similarly to a browser, works through proxy servers, and can run as a daemon for ongoing synchronization.

The project preserves a pragmatic limitation in its own documentation: usual accuracy is within about 0.5 seconds and can improve with multiple servers, but users needing better time discipline should use an NTP-family package. That framing explains htpdate's evolution as a fallback or constrained-network utility rather than a replacement for NTP, OpenNTPD, or chrony.

採用の歴史

The input package facts record htpdate in Homebrew, Debian, Ubuntu, MacPorts, Nix, and Alpine. That packaging spread is notable for a small tool because its value is situational: it becomes useful exactly on machines and networks where the usual UDP-based time-sync path is not available.

使われ方

htpdate is used to query one or more web servers, estimate clock offset from HTTP date headers, and either report or set/adjust local time. The man page and README emphasize proxy support, daemon use, IPv4/IPv6 options, HTTP/1.0 versus HTTP/1.1 behavior, and the tradeoff between convenience and precision.

パッケージ好きにとっての重要性

For package nerds, htpdate is interesting because it is the kind of tiny utility that justifies a package slot through an edge case. It exists for restricted networks, proxy-only hosts, rescue scenarios, and systems where installing a full time-sync stack is more machinery than the job requires.

タイムライン

• 2021: The twekkel/htpdate tag stream includes v1.3.0 from December.
• 2024: The tag stream includes v2.0.0 from September.
• 2024: Alpine package metadata records htpdate 2.0.0 in the community repository.
• Package-manager era: The input package facts record htpdate in Homebrew, Debian, Ubuntu, MacPorts, Nix, and Alpine.

Related projects

• htpdate is related to NTP clients such as ntpdate, ntpd, OpenNTPD, and chrony, but trades precision for HTTP reachability and proxy compatibility. The same maintainer also publishes `httpdate`, another HTTP-based time synchronization tool with a precision-oriented approach.

ソース

• https://api.github.com/repos/twekkel/htpdate/commits/01d5e9584b22ebf9b166213bfe3f221c039ec4b8
• https://api.github.com/repos/twekkel/htpdate/commits/e906bf96eac9ef5a3c0e7546724ff9b2ee817502
• https://api.github.com/repos/twekkel/htpdate/tags?per_page=20
• https://github.com/twekkel/htpdate
• https://github.com/twekkel/htpdate/blob/master/htpdate.8
• https://github.com/twekkel/httpdate
• https://pkgs.alpinelinux.org/package/edge/community/x86/htpdate
• https://www.vervest.org/htp/