bgzip: 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/bgzip - from package: tabix

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

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