gftodvi: 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 CentOS possible default full paths are:

/usr/bin/gftodvi - from package: texlive

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/gftodvi - from package: texlive-binaries

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

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