jrunscript: 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/debug/usr/lib/jvm/java-7-openjdk-amd64/bin/jrunscript - from package: openjdk-7-dbg
/usr/lib/jvm/java-7-openjdk-amd64/bin/jrunscript - from package: openjdk-7-jdk

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

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