browser: 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 Debian possible default full paths are:

/usr/bin/browser - from package: libsilo-bin

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

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