wmf: 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/wmf - from package: wmf

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

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