ccs_update_schema: 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/sbin/ccs_update_schema - from package: cman

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

On Debian possible default full paths are:

/usr/sbin/ccs_update_schema - from package: cman

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

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