file2tcp: 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/file2tcp - from package: ion

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

Error in other languages:
file2tcp: bevel nie gevind nie
file2tcp: comandă negăsită
file2tcp: comando não encontrado
file2tcp: commande introuvable
file2tcp: command not found
file2tcp: käsku ei ole
file2tcp: không tìm thấy lệnh
file2tcp: komanda nerasta
file2tcp: Kommando nicht gefunden.
file2tcp: kommandot finns inte
file2tcp: komut yok
file2tcp: nie znaleziono polecenia
file2tcp: níor aimsíodh an t-ordú
file2tcp: no se encontró la orden
file2tcp: no s'ha trobat l'ordre
file2tcp: opdracht niet gevonden
file2tcp: parancs nem található
file2tcp: perintah tidak ditemukan
file2tcp: príkaz nenájdený
file2tcp: příkaz nenalezen
file2tcp: команда не найдена
file2tcp: командата не е открита
file2tcp: 命令找不到
file2tcp: コマンドが見つかりません