gff2ps: 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/gff2ps - from package: gff2ps

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

Error in other languages:
gff2ps: bevel nie gevind nie
gff2ps: comandă negăsită
gff2ps: comando não encontrado
gff2ps: commande introuvable
gff2ps: command not found
gff2ps: käsku ei ole
gff2ps: không tìm thấy lệnh
gff2ps: komanda nerasta
gff2ps: Kommando nicht gefunden.
gff2ps: kommandot finns inte
gff2ps: komut yok
gff2ps: nie znaleziono polecenia
gff2ps: níor aimsíodh an t-ordú
gff2ps: no se encontró la orden
gff2ps: no s'ha trobat l'ordre
gff2ps: opdracht niet gevonden
gff2ps: parancs nem található
gff2ps: perintah tidak ditemukan
gff2ps: príkaz nenájdený
gff2ps: příkaz nenalezen
gff2ps: команда не найдена
gff2ps: командата не е открита
gff2ps: 命令找不到
gff2ps: コマンドが見つかりません