kcminit: 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/kcminit - from package: kdebase-workspace

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

On Debian possible default full paths are:

/usr/bin/kcminit - from package: kde-workspace-bin

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

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