pcregrep: 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/pcregrep - from package: pcre

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

On Debian possible default full paths are:

/usr/bin/pcregrep - from package: pcregrep

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

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