tv_imdb: 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/tv_imdb - from package: xmltv-util

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

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