eancheck: 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/eancheck - from package: eancheck

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

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