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Z-Modem integration for iTerm2


The purpose of this script is to add Z-Modem file transfer support to (in theory) any ssh session from within iTerm2.

This script is inspired by and would probably not exist without the scripts "" and "" (c) by Matt Mastracci,

The motivation to not forking but rewriting the scripts was mainly to put the functionality into a single shell script to make it possible to share common code used by both sending and receiving funtionality and to make it more easy to extend the functionality in future.



For sending and receiving files the Z-Modem tools are required on both machines involved in the transfer. I recommend installing the lrzsz package which should be available in most Linux distributions or which can be downloaded and build from source from:

A recent version of iTerm2 is required for Mac OS X to make things work, downloadable from:

Optionally the script supports Growl notifications. For this to work the Growl application and the additional tool "growlnotify" is needed.

Installation and configuration

The script iterm2-zmodem should by copied to /usr/local/bin.

It's required to setup the following "Triggers" in iTerm2:

Regular expression: \*\*B0100
Action:             Run Coprocess
Parameters:         /usr/local/bin/iterm2-zmodem sz

Regular expression: \*\*B00000000000000
Action:             Run Coprocess
Parameters:         /usr/local/bin/iterm2-zmodem rz

The script "iterm2-zmodem" tries to determine the names (lrz, rz, lsz, sz) and locations of the binaries of growlnotify and the Z-Modem tools. The pathes searched are:


If the Z-Modem tools are installed in some unusual place, the path can be specified when configuring the triggers using the LRZSZ_PATH environment variable, the "Parameters" setting of the trigger has to be modified in this case to become for example:

Parameters:         LRZSZ_PATH=/opt/lrzsz/bin /usr/local/bin/iterm2-zmodem rz


The file transfer is initiated on the remote machine by executing rz respectively lrz (for receiving a file on the remote machine) or by executing sz respectively lsz (for sending a file to the remote machine). See the command usage information of the Z-Modem tools for additional details.

Note, that sending files will overwrite the destination file on the local machine, if it already exists.


Use with caution. This software may contain serious bugs. I can not be made responsible for any damage the software may cause to your system or files.




Copyright (C) 2013 by Harald Lapp

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see

3rd party code

The AppleScript portion included in the script is inspired by licensed under cc-wiki with attribution required


Z-Modem integration for iTerm2







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