ssl: 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/lib/picolisp/bin/ssl - from package: picolisp

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

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