kwalletmanager: 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/kwalletmanager - from package: kdeutils

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

On Debian possible default full paths are:

/usr/bin/kwalletmanager - from package: kwalletmanager

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

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