mkuserlist: 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 Debian possible default full paths are:

/usr/lib/wims/bin/mkuserlist - from package: wims

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

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