dbiblast: 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/dbiblast - from package: emboss

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

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