crashstats: 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/crashstats - from package: crashmail

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