qt20fix: 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/lib64/qt-3.3/bin/qt20fix - from package: qt3-devel
/usr/lib/qt-3.3/bin/qt20fix - from package: qt3-devel

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

Error in other languages:
qt20fix: bevel nie gevind nie
qt20fix: comandă negăsită
qt20fix: comando não encontrado
qt20fix: commande introuvable
qt20fix: command not found
qt20fix: käsku ei ole
qt20fix: không tìm thấy lệnh
qt20fix: komanda nerasta
qt20fix: Kommando nicht gefunden.
qt20fix: kommandot finns inte
qt20fix: komut yok
qt20fix: nie znaleziono polecenia
qt20fix: níor aimsíodh an t-ordú
qt20fix: no se encontró la orden
qt20fix: no s'ha trobat l'ordre
qt20fix: opdracht niet gevonden
qt20fix: parancs nem található
qt20fix: perintah tidak ditemukan
qt20fix: príkaz nenájdený
qt20fix: příkaz nenalezen
qt20fix: команда не найдена
qt20fix: командата не е открита
qt20fix: 命令找不到
qt20fix: コマンドが見つかりません