kdemangen.pl: 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/kdemangen.pl - from package: kdesdk

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

On Debian possible default full paths are:

/usr/bin/kdemangen.pl - from package: kdesdk-scripts

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

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