colorize: 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/colorize - from package: colorize

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

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