gff2aplot: 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/gff2aplot - from package: gff2aplot

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

Error in other languages:
gff2aplot: bevel nie gevind nie
gff2aplot: comandă negăsită
gff2aplot: comando não encontrado
gff2aplot: commande introuvable
gff2aplot: command not found
gff2aplot: käsku ei ole
gff2aplot: không tìm thấy lệnh
gff2aplot: komanda nerasta
gff2aplot: Kommando nicht gefunden.
gff2aplot: kommandot finns inte
gff2aplot: komut yok
gff2aplot: nie znaleziono polecenia
gff2aplot: níor aimsíodh an t-ordú
gff2aplot: no se encontró la orden
gff2aplot: no s'ha trobat l'ordre
gff2aplot: opdracht niet gevonden
gff2aplot: parancs nem található
gff2aplot: perintah tidak ditemukan
gff2aplot: príkaz nenájdený
gff2aplot: příkaz nenalezen
gff2aplot: команда не найдена
gff2aplot: командата не е открита
gff2aplot: 命令找不到
gff2aplot: コマンドが見つかりません