ecl: 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/ecl - from package: ecl

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