pyuic4: 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/pyuic4 - from package: PyQt4-devel

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

On Debian possible default full paths are:

/usr/bin/pyuic4 - from package: pyqt4-dev-tools

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

Error in other languages:
pyuic4: bevel nie gevind nie
pyuic4: comandă negăsită
pyuic4: comando não encontrado
pyuic4: commande introuvable
pyuic4: command not found
pyuic4: käsku ei ole
pyuic4: không tìm thấy lệnh
pyuic4: komanda nerasta
pyuic4: Kommando nicht gefunden.
pyuic4: kommandot finns inte
pyuic4: komut yok
pyuic4: nie znaleziono polecenia
pyuic4: níor aimsíodh an t-ordú
pyuic4: no se encontró la orden
pyuic4: no s'ha trobat l'ordre
pyuic4: opdracht niet gevonden
pyuic4: parancs nem található
pyuic4: perintah tidak ditemukan
pyuic4: príkaz nenájdený
pyuic4: příkaz nenalezen
pyuic4: команда не найдена
pyuic4: командата не е открита
pyuic4: 命令找不到
pyuic4: コマンドが見つかりません