ircdwatch: 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/sbin/ircdwatch - from package: ircd-irc2

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

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