snake-ks: 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/sbin/snake-ks - from package: snake

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

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