fosrec: 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/fosrec - from package: fosfat

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