create_timestamp: 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/create_timestamp - from package: mirrorbrain-tools

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

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