ksendbugmail: 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 CentOS possible default full paths are:

/usr/bin/ksendbugmail - from package: kdelibs3

You may install the required package with command yum install {package}

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