g32pbm: 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/g32pbm - from package: mgetty

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

On Debian possible default full paths are:

/usr/bin/g32pbm - from package: mgetty-fax

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

Error in other languages:
g32pbm: bevel nie gevind nie
g32pbm: comandă negăsită
g32pbm: comando não encontrado
g32pbm: commande introuvable
g32pbm: command not found
g32pbm: käsku ei ole
g32pbm: không tìm thấy lệnh
g32pbm: komanda nerasta
g32pbm: Kommando nicht gefunden.
g32pbm: kommandot finns inte
g32pbm: komut yok
g32pbm: nie znaleziono polecenia
g32pbm: níor aimsíodh an t-ordú
g32pbm: no se encontró la orden
g32pbm: no s'ha trobat l'ordre
g32pbm: opdracht niet gevonden
g32pbm: parancs nem található
g32pbm: perintah tidak ditemukan
g32pbm: príkaz nenájdený
g32pbm: příkaz nenalezen
g32pbm: команда не найдена
g32pbm: командата не е открита
g32pbm: 命令找不到
g32pbm: コマンドが見つかりません