file2mod: command not found

Have You tried accessing the binary with the full path?

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/file2mod - from package: opencaster

You may install the required package with command apt-get install {package}
Error in other languages:
file2mod: bevel nie gevind nie
file2mod: comandă negăsită
file2mod: comando não encontrado
file2mod: commande introuvable
file2mod: command not found
file2mod: käsku ei ole
file2mod: không tìm thấy lệnh
file2mod: komanda nerasta
file2mod: Kommando nicht gefunden.
file2mod: kommandot finns inte
file2mod: komut yok
file2mod: nie znaleziono polecenia
file2mod: níor aimsíodh an t-ordú
file2mod: no se encontró la orden
file2mod: no s'ha trobat l'ordre
file2mod: opdracht niet gevonden
file2mod: parancs nem található
file2mod: perintah tidak ditemukan
file2mod: príkaz nenájdený
file2mod: příkaz nenalezen
file2mod: команда не найдена
file2mod: командата не е открита
file2mod: 命令找不到
file2mod: コマンドが見つかりません