kcoloredit: 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 CentOS possible default full paths are:

/usr/bin/kcoloredit - from package: kcoloredit

You may install the required package with command yum install {package}

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