: This is the most common protocol used with sz because it supports "AutoDownload," allowing the local terminal to start receiving the file without user intervention.
While still available on most Linux distributions, sz is an older tool. For modern Windows environments using , some users prefer trzsz , which offers similar ZMODEM-like functionality with better support for modern terminal features. Dropped Z-MODEM support (and one alternative) #13 - GitHub sz.exe
-y : Instructs the receiver to overwrite existing files with the same name unconditionally. : This is the most common protocol used
: While sz is for sending from the server, its counterpart rz is used to receive files uploaded from your local machine to the server. Key Command Options Dropped Z-MODEM support (and one alternative) #13 -
The primary purpose of sz is to initiate a "send" operation. When you execute it on a remote server, it communicates with a compatible terminal emulator (like SecureCRT , PuTTY , or KiTTY ) on your local machine to automatically trigger a download.
You can modify how sz handles transfers using various flags:
-e : Escapes all control characters to prevent them from being interpreted by the terminal, which helps avoid "interrupted" transfers.