tfextract: 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/tfextract - from package: emboss

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

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