brew

Install lrzsz with Homebrew, apt, dnf, MacPorts, Nix, pacman, scoop, winget, zypper

Tools for zmodem/xmodem/ymodem file transfer. Version 0.12.20 via Homebrew; verified from local package data.

Install command Security notes

install

Additional install commands

macOS

Homebrewverified · 100%

brew install lrzsz

local Homebrew formula metadata

MacPortsverified · 94%

sudo port install lrzsz

MacPorts ports tree · comms/lrzsz/Portfile · source: api.github.com

Linux

Debian aptverified · 92%

sudo apt install lrzsz

Debian stable package indexes · lrzsz · source: deb.debian.org

Fedora dnfverified · 92%

sudo dnf install lrzsz

Fedora Rawhide package metadata · lrzsz · source: dl.fedoraproject.org

Nixverified · 92%

nix profile install nixpkgs#lrzsz

nixpkgs package indexes · pkgs/by-name/lr/lrzsz/package.nix · source: api.github.com

Arch Linux pacmanverified · 92%

sudo pacman -S lrzsz

Arch Linux sync databases · lrzsz · source: geo.mirror.pkgbuild.com

openSUSE zypperverified · 92%

sudo zypper install rzsz

openSUSE Tumbleweed package metadata · rzsz · source: download.opensuse.org

Windows

Scoopverified · 92%

scoop install main/lrzsz

Scoop official bucket manifest trees · bucket/lrzsz.json · source: api.github.com

Windows Package Managerverified · 92%

winget install --id trzsz.lrzsz -e

Windows Package Manager source index · trzsz.lrzsz · source: cdn.winget.microsoft.com

overview

Package summary

Tools for zmodem/xmodem/ymodem file transfer

Project links

Commands and aliases

history

Project history and usage

lrzsz is Uwe Ohse's free Unix implementation of the XMODEM, YMODEM, and ZMODEM file-transfer tools, including the familiar `rz` and `sz` commands.

Project history

The official lrzsz page describes it as a Unix communication package providing XMODEM, YMODEM, and ZMODEM protocols. It says lrzsz is a heavily reworked version of the last public-domain release of Omen Technologies' rzsz package, relicensed as free software under the GNU GPL.

The official changelog on the same page records active 0.12.x development from August 1996 through December 1998, focused on portability, syslog support, TCP options, performance, security fixes, Dejagnu tests, and platform support including BeOS and older SCO.

Adoption history

The supplied package-manager facts list lrzsz across Homebrew, Debian, Ubuntu, Fedora, Arch, Nix, MacPorts, Scoop, WinGet, and openSUSE. That packaging persistence reflects how `rz` and `sz` remained useful for terminal-based file transfer, serial links, embedded consoles, BBS-era workflows, and recovery environments.

The project page's latest release is 0.12.20 from December 1998, so modern adoption is mostly maintenance packaging of a stable old tool rather than a fast-moving upstream.

How it is used

Users typically invoke `rz` to receive files and `sz` to send files through a terminal or serial session that supports ZMODEM-style transfers. The package also includes prefixed variants such as `lrz`, `lsz`, `lrx`, and `lsx`.

No official config file or credential store is documented; transfer behavior is controlled with command-line options and the surrounding terminal or serial connection.

Why package nerds care

lrzsz is package-nerd archaeology that still earns its keep: a compact compatibility package for protocols older than many current distributions, but still handy when the transport is a shell, modem-like terminal, or serial console instead of SSH/SCP.

Timeline

1996: Official changelog begins the visible 0.12.x release series.
1997: Releases add portability work, TCP options, gettext/autoconf updates, and performance improvements.
1998: Version 0.12.20 becomes the latest official release.
2026: Supplied package-manager facts list broad packaging across Unix-like and Windows package managers.

Related projects

lrzsz descends from Omen Technologies' rzsz and implements the XMODEM, YMODEM, and ZMODEM protocol family used by terminal programs and serial-transfer workflows.

Sources

https://www.ohse.de/uwe/software/lrzsz.html
source_facts.package-manager

security posture

Risk level: green

narrow executable package without higher-risk signals.

Risk classifier

green risk · low confidence · appliance

Why

narrow executable package without higher-risk signals

Signals

metadata:no-higher-risk-signals

Install behavior

No Homebrew post-install hook is recorded in formula metadata.
Homebrew bottle metadata is available for 13 platform targets.

Recommended review

Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.

executables

Installed executables

Command	Kind	Exposure
`lrb`	cli	global executable
`lrx`	cli	global executable
`lrz`	cli	global executable
`lsb`	cli	global executable
`lsx`	cli	global executable
`lsz`	cli	global executable
`rz`	cli	global executable
`sz`	cli	global executable

freshness

Version and freshness

These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.

page generated2026-07-08

manager version0.12.20

manager updated

local dataok

upstreamnot checked

latest detectednot detected

https://www.ohse.de/uwe/software/lrzsz.html

infoNo package-manager update timestamp was available.low confidence
infoRelease/tag comparison is only available for GitHub repositories.https://www.ohse.de/uwe/software/lrzsz.htmlnone confidence

install metadata

Package metadata

Package key	brew:lrzsz
Version	0.12.20
Package manager	Homebrew
Package manager page	https://formulae.brew.sh/formula/lrzsz
Homepage	https://www.ohse.de/uwe/software/lrzsz.html
Upstream docs	https://www.ohse.de/uwe/software/lrzsz.html
License	GPL-2.0-or-later
Source archive	https://www.ohse.de/uwe/releases/lrzsz-0.12.20.tar.gz
Bottle	available (on arm64_big_sur, arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, big_sur, catalina, monterey, sonoma, ventura, x86_64_linux)
Homebrew post-install	not defined
Service	none declared

registry facts

Source database details

Source Database	Homebrew formula API
Tap	homebrew/core
Full Name	lrzsz
Version Scheme	0
Revision	1
Conflicts With	lrzip
Bottle Stable Root URL	https://ghcr.io/v2/homebrew/core
Deprecated	no
Disabled	no
Keg Only	no
URL Keys	stable

source database matches

Other package-manager records

Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.

Debian apt95%

lrzsz 0.12.21rc-0.2

Tools for zmodem/xmodem/ymodem file transfer

https://ohse.de/uwe/software/lrzsz.html

sudo apt install lrzsz

Section: comm
Architecture: amd64
1 dependencies
1 optional deps
normalized package name match
Matched by: Lrzsz

Debian stable package indexes · deb.debian.org · Debian stable package indexes: lrzsz from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz

Nix95%

lrzsz

nix profile install nixpkgs#lrzsz

normalized package name match
Matched by: Lrzsz

nixpkgs package indexes · api.github.com · nixpkgs package indexes: pkgs/by-name/lr/lrzsz/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1

Ubuntu apt95%

lrzsz 0.12.21-11build1

Tools for zmodem/xmodem/ymodem file transfer

https://ohse.de/uwe/software/lrzsz.html

sudo apt install lrzsz

Section: universe/comm
Architecture: amd64
1 dependencies
1 optional deps
normalized package name match
Matched by: Lrzsz

Ubuntu 24.04 LTS package indexes · archive.ubuntu.com · Ubuntu 24.04 LTS package indexes: lrzsz from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz

dnf95%

lrzsz 0.12.20-76.fc44

The lrz and lsz modem communications programs

http://www.ohse.de/uwe/software/lrzsz.html

sudo dnf install lrzsz

License: GPL-2.0-or-later AND GPL-2.0-only
Category: Unspecified
Architecture: x86_64
Source Package: lrzsz
2 dependencies
1 provides
normalized package name match
Matched by: Lrzsz

Fedora Rawhide package metadata · dl.fedoraproject.org · Fedora Rawhide package metadata: lrzsz from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst

pacman95%

lrzsz 0.12.20-14

xmodem, ymodem and zmodem file transfer protocols

https://www.ohse.de/uwe/software/lrzsz.html

sudo pacman -S lrzsz

License: GPL-2.0-only
Architecture: x86_64
normalized package name match
Matched by: Lrzsz

Arch Linux sync databases · geo.mirror.pkgbuild.com · Arch Linux sync databases: lrzsz from https://geo.mirror.pkgbuild.com/extra/os/x86_64/extra.db.tar.gz

zypper95%

rzsz 0.12.21~rc-9.2

X-, Y-, and Z-Modem Data Transfer Protocols

http://www.ohse.de/uwe/software/lrzsz.html

sudo zypper install rzsz

License: GPL-2.0-or-later
Category: Hardware/Modem
Architecture: x86_64
Source Package: rzsz
1 dependencies
2 provides
normalized package name match
Matched by: Lrzsz

openSUSE Tumbleweed package metadata · download.opensuse.org · openSUSE Tumbleweed package metadata: rzsz from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst

MacPorts95%

lrzsz

sudo port install lrzsz

normalized package name match
Matched by: Lrzsz

MacPorts ports tree · api.github.com · MacPorts ports tree: comms/lrzsz/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1

Scoop95%

main/lrzsz

scoop install main/lrzsz

normalized package name match
Matched by: Lrzsz

Scoop official bucket manifest trees · api.github.com · Scoop official bucket manifest trees: bucket/lrzsz.json from https://api.github.com/repos/ScoopInstaller/Main/git/trees/master?recursive=1

winget95%

trzsz.lrzsz

winget install --id trzsz.lrzsz -e

normalized package name match
Matched by: Lrzsz

Windows Package Manager source index · cdn.winget.microsoft.com · Windows Package Manager source index: trzsz.lrzsz from https://cdn.winget.microsoft.com/cache/source.msix

MacPorts94%

lsx

sudo port install lsx

installed executable or alias match
Matched by: Lsx

MacPorts ports tree · api.github.com · MacPorts ports tree: sysutils/lsx/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1

Debian apt92%

lsb-base 11.6

transitional package for Linux Standard Base init script functionality

https://wiki.linuxfoundation.org/lsb/start

sudo apt install lsb-base

Section: misc
Architecture: all
Source Package: lsb
1 dependencies
installed executable or alias match
Matched by: Lsb

Debian stable package indexes · deb.debian.org · Debian stable package indexes: lsb-base from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz

Ubuntu apt92%

lsb-base 11.6

transitional package for Linux Standard Base init script functionality

https://wiki.linuxfoundation.org/lsb/start

sudo apt install lsb-base

Section: misc
Architecture: all
Source Package: lsb
1 dependencies
installed executable or alias match
Matched by: Lsb

Ubuntu 24.04 LTS package indexes · archive.ubuntu.com · Ubuntu 24.04 LTS package indexes: lsb-base from https://archive.ubuntu.com/ubuntu/dists/noble/main/binary-amd64/Packages.gz

dnf92%

redhat-lsb 5.0-0.18.20231006git8d00acdc.fc44

Partial implementation of Linux Standard Base specification

https://wiki.linuxfoundation.org/lsb/start

sudo dnf install redhat-lsb

License: GPL-2.0-only
Category: Unspecified
Architecture: noarch
Source Package: redhat-lsb
3 dependencies
3 provides
installed executable or alias match
Matched by: Lsb

Fedora Rawhide package metadata · dl.fedoraproject.org · Fedora Rawhide package metadata: redhat-lsb from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst

pacman92%

sz 3.3.2-2

Modular parametrizable lossy compressor framework for scientific data

https://szcompressor.org/

sudo pacman -S sz

License: LicenseRef-BSD-3-Clause-UChicago-Argonne
Architecture: x86_64
7 dependencies
installed executable or alias match
Matched by: Sz

Arch Linux sync databases · geo.mirror.pkgbuild.com · Arch Linux sync databases: sz from https://geo.mirror.pkgbuild.com/extra/os/x86_64/extra.db.tar.gz

zypper92%

lsb 4.0.fake-4.3

LSB Fake Package

https://www.linuxbase.org/

sudo zypper install lsb

License: GPL-2.0-or-later
Category: System/Fhs
Architecture: x86_64
Source Package: lsb
32 dependencies
7 provides
installed executable or alias match
Matched by: Lsb

openSUSE Tumbleweed package metadata · download.opensuse.org · openSUSE Tumbleweed package metadata: lsb from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst

source trail

Generated from repository data

This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.

Combined YAML source

View the package source record on GitHub.

combined/lrzsz.yml

Used sources

Geiger risk classifier
Nucleus package database
av.db category and tag curation
cross-ecosystem install command graph
curated package history
external package-manager database matches
package relationship graph
package version freshness
package-page enrichment

Install lrzsz with Homebrew, apt, dnf, MacPorts, Nix, pacman, scoop, winget, zypper

Additional install commands

macOS

Linux

Windows

Package summary

Project links

Commands and aliases

Project history and usage

Project history

Adoption history

How it is used

Why package nerds care

Timeline

Related projects

Sources

Risk level: green

Risk classifier

Why

Signals

Install behavior

Recommended review

Installed executables

Version and freshness

Package metadata

Source database details

Other package-manager records

Internal package links

Topical hubs

Related tools

Same workflow

Agent security guides

Generated from repository data

Combined YAML source

Used sources