webcontentedit: 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/webcontentedit - from package: weboob

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

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