snapraid: 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/snapraid - from package: snapraid

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

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