freeramdisk: 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:

/sbin/freeramdisk - from package: loadlin

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