taxgetrank: 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/taxgetrank - from package: emboss

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

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