simarrange: 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/simarrange - from package: simarrange

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

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