grolbp: 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/grolbp - from package: groff

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

On Debian possible default full paths are:

/usr/bin/grolbp - from package: groff

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

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