confclerk: 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/confclerk - from package: confclerk

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

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