Man pages › Compared with Linux and the BSDs

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

tmux is not in the Solnix base system: install pkgs.solnix.tmux. The Solnix page matches the OpenBSD and NetBSD pages for most options. The differences are that it has no -h, it documents an -A flag that the BSD synopses lack, and its default-command wording and config search path differ.

The manual pages

Solnix: tmux(1) from pkgs.solnix.tmux
OpenBSD: tmux(1) 8.0
NetBSD: tmux(1) 11.0

What Solnix runs

Not installed by default: add pkgs.solnix.tmux. No other illumos variants are shipped. The bundle contains no illumos tmux page, so there is nothing to compare against a base-system implementation.

Differences

Compared with	Topic	What differs
OpenBSD, NetBSD	`-h` usage flag	OpenBSD and NetBSD tmux accept `-h` to print usage information and exit. The Solnix SYNOPSIS and option list have no `-h`. Source: OpenBSD tmux(1) SYNOPSIS, -h; NetBSD tmux(1) SYNOPSIS, -h; Solnix tmux(1) SYNOPSIS
OpenBSD	user config search path	Solnix and NetBSD tmux read `/etc/tmux.conf`, then ~/.tmux.conf or $XDG_CONFIG_HOME/tmux/tmux.conf. OpenBSD documents only `/etc/tmux.conf` and ~/.tmux.conf, with no XDG path. Source: Solnix tmux(1) -f; NetBSD tmux(1) -f; OpenBSD tmux(1) -f
OpenBSD, NetBSD	command used when none is given	Solnix says new-session is assumed when no command is given. OpenBSD and NetBSD say the command in default-client-command is assumed, which defaults to new-session. Source: Solnix tmux(1) command [flags]; OpenBSD tmux(1) command [flags]; NetBSD tmux(1) command [flags]
OpenBSD, NetBSD	`-A` listed in Solnix flags	The extracted flag list for Solnix includes `-A`, which the OpenBSD and NetBSD lists lack. The visible Solnix SYNOPSIS and option text do not show `-A`, so the bundle does not say what it does. Check the installed page before relying on it. Source: Solnix tmux(1) extracted option flags; Solnix tmux(1) SYNOPSIS
OpenBSD, NetBSD	option documentation	The OpenBSD and NetBSD OPTIONS sections say each option has scopes and a type, and that flag-type options accept 1, on, yes, 0, off or no. The Solnix OPTIONS text describes four option types (server, session, window, pane) and says a flag value is on, off, or omitted to toggle. Source: Solnix tmux(1) OPTIONS, set-option; OpenBSD tmux(1) OPTIONS; NetBSD tmux(1) OPTIONS
Linux	no Linux page in the bundle	The bundle has no Linux tmux page, so no claim is made about Linux differences. The Solnix text shows no Linux-specific behaviour. Source: Bundle header: counterparts are openbsd and netbsd only
OpenBSD, NetBSD	shared behaviour	Solnix, OpenBSD and NetBSD document the same socket location (TMUX_TMPDIR or /tmp, in a tmux-UID directory), the same `-L` and `-S` rules, SIGUSR1 to recreate the socket, and SIGUSR2 to toggle logging. Source: Solnix, OpenBSD and NetBSD tmux(1) -L, -S, -v

Standards

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

Writing portable scripts

Do not rely on tmux -h: Solnix does not document it. Use tmux -V to check the version.
Do not rely on the XDG config path. Put the config in ~/.tmux.conf, or pass -f file, so it works on OpenBSD too.

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.