ecm-uncompress: 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/ecm-uncompress - from package: ecm

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

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