sys_basher: 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/sys_basher - from package: sys_basher

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

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