colorname: 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/colorname - from package: colorname

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

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