jsc: command not found

Have You tried accessing the binary with the full path?

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/jsc - from package: libjavascriptcoregtk-3.0-bin
/usr/bin/jsc - from package: libjavascriptcoregtk-4.0-bin

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