mbrowse: 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/mbrowse - from package: mbrowse

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

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