smartsim: 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/smartsim - from package: smartsim

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

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