doconce: 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/doconce - from package: doconce

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

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