ifexport: 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/ifexport - from package: ctsim

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

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