ospent: 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/ospent - from package: opensp

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

On Debian possible default full paths are:

/usr/bin/ospent - from package: opensp

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

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