sim_lsmplugin: 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/sim_lsmplugin - from package: libstoragemgmt-python

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

On Debian possible default full paths are:

/usr/bin/sim_lsmplugin - from package: libstoragemgmtd

You may install the required package with command apt-get install {package}

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