pogrep: 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/pogrep - from package: translate-toolkit

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

On Debian possible default full paths are:

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

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

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