th-cmd: 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/sbin/th-cmd - from package: triggerhappy

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

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