sobby: 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/sobby - from package: sobby

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

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