makekdewidgets4: 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/makekdewidgets4 - from package: kdelibs-devel

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

Error in other languages:
makekdewidgets4: bevel nie gevind nie
makekdewidgets4: comandă negăsită
makekdewidgets4: comando não encontrado
makekdewidgets4: commande introuvable
makekdewidgets4: command not found
makekdewidgets4: käsku ei ole
makekdewidgets4: không tìm thấy lệnh
makekdewidgets4: komanda nerasta
makekdewidgets4: Kommando nicht gefunden.
makekdewidgets4: kommandot finns inte
makekdewidgets4: komut yok
makekdewidgets4: nie znaleziono polecenia
makekdewidgets4: níor aimsíodh an t-ordú
makekdewidgets4: no se encontró la orden
makekdewidgets4: no s'ha trobat l'ordre
makekdewidgets4: opdracht niet gevonden
makekdewidgets4: parancs nem található
makekdewidgets4: perintah tidak ditemukan
makekdewidgets4: príkaz nenájdený
makekdewidgets4: příkaz nenalezen
makekdewidgets4: команда не найдена
makekdewidgets4: командата не е открита
makekdewidgets4: 命令找不到
makekdewidgets4: コマンドが見つかりません