process_snapshot: 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/process_snapshot - from package: libstatgrab-examples

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

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