regsvr32: 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/regsvr32 - from package: wine-common

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

On Debian possible default full paths are:

/usr/bin/regsvr32 - from package: wine

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

Error in other languages:
regsvr32: bevel nie gevind nie
regsvr32: comandă negăsită
regsvr32: comando não encontrado
regsvr32: commande introuvable
regsvr32: command not found
regsvr32: käsku ei ole
regsvr32: không tìm thấy lệnh
regsvr32: komanda nerasta
regsvr32: Kommando nicht gefunden.
regsvr32: kommandot finns inte
regsvr32: komut yok
regsvr32: nie znaleziono polecenia
regsvr32: níor aimsíodh an t-ordú
regsvr32: no se encontró la orden
regsvr32: no s'ha trobat l'ordre
regsvr32: opdracht niet gevonden
regsvr32: parancs nem található
regsvr32: perintah tidak ditemukan
regsvr32: príkaz nenájdený
regsvr32: příkaz nenalezen
regsvr32: команда не найдена
regsvr32: командата не е открита
regsvr32: 命令找不到
regsvr32: コマンドが見つかりません