ppod2latex: 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/ppod2latex - from package: perl-Pod-PseudoPod-LaTeX

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

Error in other languages:
ppod2latex: bevel nie gevind nie
ppod2latex: comandă negăsită
ppod2latex: comando não encontrado
ppod2latex: commande introuvable
ppod2latex: command not found
ppod2latex: käsku ei ole
ppod2latex: không tìm thấy lệnh
ppod2latex: komanda nerasta
ppod2latex: Kommando nicht gefunden.
ppod2latex: kommandot finns inte
ppod2latex: komut yok
ppod2latex: nie znaleziono polecenia
ppod2latex: níor aimsíodh an t-ordú
ppod2latex: no se encontró la orden
ppod2latex: no s'ha trobat l'ordre
ppod2latex: opdracht niet gevonden
ppod2latex: parancs nem található
ppod2latex: perintah tidak ditemukan
ppod2latex: príkaz nenájdený
ppod2latex: příkaz nenalezen
ppod2latex: команда не найдена
ppod2latex: командата не е открита
ppod2latex: 命令找不到
ppod2latex: コマンドが見つかりません