colorhug-flash: 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/colorhug-flash - from package: colorhug-client

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

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