tasque: 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/tasque - from package: tasque

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

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