paltohdf: 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/paltohdf - from package: hdf

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

On Debian possible default full paths are:

/usr/bin/paltohdf - from package: hdf4-tools

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

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