julia: 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/julia - from package: julia

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