sha384: 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/sbin/sha384 - from package: hashalot

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

Error in other languages:
sha384: bevel nie gevind nie
sha384: comandă negăsită
sha384: comando não encontrado
sha384: commande introuvable
sha384: command not found
sha384: käsku ei ole
sha384: không tìm thấy lệnh
sha384: komanda nerasta
sha384: Kommando nicht gefunden.
sha384: kommandot finns inte
sha384: komut yok
sha384: nie znaleziono polecenia
sha384: níor aimsíodh an t-ordú
sha384: no se encontró la orden
sha384: no s'ha trobat l'ordre
sha384: opdracht niet gevonden
sha384: parancs nem található
sha384: perintah tidak ditemukan
sha384: príkaz nenájdený
sha384: příkaz nenalezen
sha384: команда не найдена
sha384: командата не е открита
sha384: 命令找不到
sha384: コマンドが見つかりません