tagtool: 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/tagtool - from package: tagtool

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

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