critterding: 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/critterding - from package: critterding

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

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