po2txt: 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/po2txt - from package: translate-toolkit

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

On Debian possible default full paths are:

/usr/bin/po2txt - from package: translate-toolkit
/usr/share/gfxboot/themes/KDE/po/bin/po2txt - from package: gfxboot-themes
/usr/share/gfxboot/themes/openSUSE/po/bin/po2txt - from package: gfxboot-themes
/usr/share/gfxboot/themes/SLED/po/bin/po2txt - from package: gfxboot-themes
/usr/share/gfxboot/themes/SLES/po/bin/po2txt - from package: gfxboot-themes
/usr/share/gfxboot/themes/upstream/po/bin/po2txt - from package: gfxboot-themes

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

Error in other languages:
po2txt: bevel nie gevind nie
po2txt: comandă negăsită
po2txt: comando não encontrado
po2txt: commande introuvable
po2txt: command not found
po2txt: käsku ei ole
po2txt: không tìm thấy lệnh
po2txt: komanda nerasta
po2txt: Kommando nicht gefunden.
po2txt: kommandot finns inte
po2txt: komut yok
po2txt: nie znaleziono polecenia
po2txt: níor aimsíodh an t-ordú
po2txt: no se encontró la orden
po2txt: no s'ha trobat l'ordre
po2txt: opdracht niet gevonden
po2txt: parancs nem található
po2txt: perintah tidak ditemukan
po2txt: príkaz nenájdený
po2txt: příkaz nenalezen
po2txt: команда не найдена
po2txt: командата не е открита
po2txt: 命令找不到
po2txt: コマンドが見つかりません