copy: 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/lib/nodejs/tilelive/bin/copy - from package: node-tilelive

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

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