web2py2po: 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/web2py2po - from package: translate-toolkit

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

On Debian possible default full paths are:

/usr/bin/web2py2po - from package: translate-toolkit

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

Error in other languages:
web2py2po: bevel nie gevind nie
web2py2po: comandă negăsită
web2py2po: comando não encontrado
web2py2po: commande introuvable
web2py2po: command not found
web2py2po: käsku ei ole
web2py2po: không tìm thấy lệnh
web2py2po: komanda nerasta
web2py2po: Kommando nicht gefunden.
web2py2po: kommandot finns inte
web2py2po: komut yok
web2py2po: nie znaleziono polecenia
web2py2po: níor aimsíodh an t-ordú
web2py2po: no se encontró la orden
web2py2po: no s'ha trobat l'ordre
web2py2po: opdracht niet gevonden
web2py2po: parancs nem található
web2py2po: perintah tidak ditemukan
web2py2po: príkaz nenájdený
web2py2po: příkaz nenalezen
web2py2po: команда не найдена
web2py2po: командата не е открита
web2py2po: 命令找不到
web2py2po: コマンドが見つかりません