perlbrew: 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/perlbrew - from package: perlbrew

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

On Debian possible default full paths are:

/usr/bin/perlbrew - from package: perlbrew

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

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