---
name: "qmail-newu"
section: "8"
platform: "linux"
package: "qmail"
version: "1.06-6.2~deb10u1"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/qmail-newu"
---

# qmail-newu(8)

prepare address assignments for qmail-lspawn

## NAME

qmail-newu - prepare address assignments for qmail-lspawn

## SYNOPSIS

**qmail-newu**

## DESCRIPTION

**qmail-newu** reads the assignments in **/var/lib/qmail/users/assign** and writes them into **/var/lib/qmail/users/cdb** in a binary format suited for quick access by **qmail-lspawn**.

If there is a problem with **users/assign**, **qmail-newu** complains and leaves **users/cdb** alone.

**qmail-newu** ensures that **users/cdb** is updated atomically, so **qmail-lspawn** never has to wait for **qmail-newu** to finish. However, **qmail-newu** makes no attempt to protect against two simultaneous updates of **users/cdb**.

The binary **users/cdb** format is portable across machines.

## SEE ALSO

[qmail-users(5)](/qmail-users/5.md), [qmail-lspawn(8)](/qmail-lspawn/8.md), [qmail-pw2u(8)](/qmail-pw2u/8.md)