pbm2l7k: 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/pbm2l7k - from package: pbm2l7k

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

Error in other languages:
pbm2l7k: bevel nie gevind nie
pbm2l7k: comandă negăsită
pbm2l7k: comando não encontrado
pbm2l7k: commande introuvable
pbm2l7k: command not found
pbm2l7k: käsku ei ole
pbm2l7k: không tìm thấy lệnh
pbm2l7k: komanda nerasta
pbm2l7k: Kommando nicht gefunden.
pbm2l7k: kommandot finns inte
pbm2l7k: komut yok
pbm2l7k: nie znaleziono polecenia
pbm2l7k: níor aimsíodh an t-ordú
pbm2l7k: no se encontró la orden
pbm2l7k: no s'ha trobat l'ordre
pbm2l7k: opdracht niet gevonden
pbm2l7k: parancs nem található
pbm2l7k: perintah tidak ditemukan
pbm2l7k: príkaz nenájdený
pbm2l7k: příkaz nenalezen
pbm2l7k: команда не найдена
pbm2l7k: командата не е открита
pbm2l7k: 命令找不到
pbm2l7k: コマンドが見つかりません