htmlcopy: 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/htmlcopy - from package: libhtml-copy-perl

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

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