Fgrids: 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/Fgrids - from package: ferret-vis

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

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