fiascotopnm: 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/fiascotopnm - from package: netpbm-progs

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

On Debian possible default full paths are:

/usr/bin/fiascotopnm - from package: netpbm

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

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