queue-repair: 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/sbin/queue-repair - from package: qmail-tools

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

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