Man pages › Compared with Linux and the BSDs

`xz(1)` on Solnix vs Linux and the BSDs

xz is not in the Solnix base system. Install pkgs.solnix.xz to get it. The Solnix page matches the Linux, FreeBSD and NetBSD xz(1) pages in the sections the bundle includes. The only difference found is that --no-sync is not in the Solnix page's extracted option list.

The manual pages

Solnix: xz(1) from pkgs.solnix.xz
Linux: xz(1) xz-5.8.4
FreeBSD: xz(1) 15.1-RELEASE
NetBSD: xz(1) 11.0

What Solnix runs

Not installed by default: add pkgs.solnix.xz. The package publishes the upstream xz implementation, and no other illumos variants are shipped. The man page names the same command aliases as the other systems: unxz, xzcat, lzma, unlzma and lzcat. The Solnix package version is not stated in the bundle.

Differences

Compared with	Topic	What differs
all four	not in the base system	A default Solnix system has no xz on PATH. Linux, FreeBSD and NetBSD ship xz(1) pages in this comparison, and the Solnix header says to install pkgs.solnix.xz first. Scripts that call xz, unxz or xzcat fail until the package is added. Source: Solnix bundle header (command on PATH: none: install pkgs.solnix.xz)
Linux, FreeBSD, NetBSD	`--no-sync` option	The Linux (xz-5.8.4), FreeBSD 15.1 and NetBSD 11.0 pages list `--no-sync`. The option list extracted from the Solnix page does not include it. Treat `--no-sync` as unavailable on Solnix unless the installed xz `--help` shows it. The trimmed bundle cannot confirm this. Source: Option flags header: linux/freebsd/netbsd xz list --no-sync; solnix list does not
Linux, FreeBSD, NetBSD	same program	Apart from `--no-sync`, the Solnix text matches the Linux, FreeBSD and NetBSD pages in the visible sections. These cover file suffix handling, skipping of files with several hard links or setuid/setgid/sticky bits, concatenation and padding, the XZ_DEFAULTS variable, and SIGINFO/SIGUSR1 progress output. The memory limiter is off by default on all four. Source: xz(1) DESCRIPTION, Memory usage and Concatenation and padding sections on Solnix, Linux, FreeBSD and NetBSD

Standards

POSIX: xz is not a POSIX.1-2024 utility.

Writing portable scripts

Do not use --no-sync in portable scripts. The Solnix page's option list does not include it, although the Linux, FreeBSD and NetBSD pages do.
Do not rely on xz copying ACLs or extended attributes. All the pages say xz does not support this yet. If memory is limited, set XZ_DEFAULTS=--memlimit=limit, because the limiter is disabled by default.

Every difference here is taken from the manual pages linked above: Solnix's published page, Linux (man-pages and the GNU and util-linux manuals), FreeBSD, OpenBSD and NetBSD. Each row names its source. Where a manual is silent, this page is too. Compiled 2026-10-26. Found a mistake? Mail hackers@lists.solnix.io.