copylink: 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/copylink - from package: libfile-copy-link-perl

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

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