amo-changelog: 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/amo-changelog - from package: mozilla-devscripts

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

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