tcmd: 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/tcmd - from package: tcm

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

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