tkmore: 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/tkmore - from package: libtk-pod-perl

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

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