tasm: 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/tasm - from package: yasm

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

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