sasldblistusers2: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/sbin/sasldblistusers2 - from package: cyrus-sasl-lib

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/sbin/sasldblistusers2 - from package: sasl2-bin

You may install the required package with command apt-get install {package}

Error in other languages:
sasldblistusers2: bevel nie gevind nie
sasldblistusers2: comandă negăsită
sasldblistusers2: comando não encontrado
sasldblistusers2: commande introuvable
sasldblistusers2: command not found
sasldblistusers2: käsku ei ole
sasldblistusers2: không tìm thấy lệnh
sasldblistusers2: komanda nerasta
sasldblistusers2: Kommando nicht gefunden.
sasldblistusers2: kommandot finns inte
sasldblistusers2: komut yok
sasldblistusers2: nie znaleziono polecenia
sasldblistusers2: níor aimsíodh an t-ordú
sasldblistusers2: no se encontró la orden
sasldblistusers2: no s'ha trobat l'ordre
sasldblistusers2: opdracht niet gevonden
sasldblistusers2: parancs nem található
sasldblistusers2: perintah tidak ditemukan
sasldblistusers2: príkaz nenájdený
sasldblistusers2: příkaz nenalezen
sasldblistusers2: команда не найдена
sasldblistusers2: командата не е открита
sasldblistusers2: 命令找不到
sasldblistusers2: コマンドが見つかりません