### reconfigure an installed program
dpkg-reconfigure <name>

### reconfigure console setting
dpkg-reconfigure console-data

### reconfigure the whole system
dpkg-reconfigure -a

### setting up timezone
tzconfig

### update apt-get source list
apt-get update

### install a package (one can also use aptitude)
apt-get install <name>

### upgrade the whole system
apt-get dist-upgrade

Some Ubuntu configure and update commands

linux, ubuntu

Bash