remove-tel: 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/remove-tel - from package: fso-frameworkd

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

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