rxqueue: 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/bin/rxqueue - from package: regina-rexx

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

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