tcrd: 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/tcrd - from package: tcm

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

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