gravit: 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/gravit - from package: gravit

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

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