opensesame: 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/opensesame - from package: opensesame

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

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