khotnewstuff: 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/khotnewstuff - from package: kdelibs3

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

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