charybdis-ircd: 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/charybdis-ircd - from package: charybdis

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

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