gbrowse_import_ucsc_db: 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_import_ucsc_db - from package: gbrowse

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

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