wcmgr: 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/wcmgr - from package: webalizer

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

On Debian possible default full paths are:

/usr/bin/wcmgr - from package: webalizer

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

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