gbrowse_slave: 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/gbrowse_slave - from package: gbrowse

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

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