taxblast: 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/taxblast - from package: blast2

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

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