charybdis-convertilines: command not found

Have You tried accessing the binary with the full path?

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/charybdis-convertilines - from package: charybdis

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