queue: 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/sympa/bin/queue - from package: sympa

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

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