findsmb: 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/findsmb - from package: samba-client

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

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