zpcregrep: 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 Debian possible default full paths are:

/usr/bin/zpcregrep - from package: pcregrep

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

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