gromit: 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/gromit - from package: gromit

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

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