kaddressbook: 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 CentOS possible default full paths are:

/usr/bin/kaddressbook - from package: kdepim

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

On Debian possible default full paths are:

/usr/bin/kaddressbook - from package: kaddressbook

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