polarssl_benchmark: 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 Debian possible default full paths are:

/usr/bin/polarssl_benchmark - from package: libpolarssl-runtime

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

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