How to know if a package is installed
We can use the aptitude command to know if a package has been installed on Debian GNU/Linux or derivative. In CentOS/RHEL/Fedora you can use yum
How to know if a package is installed Read More »
apt-get
apt-get proxy configuration
Q. How can I configure apt-get to update my packages if I'm behind a proxy?
R. you must edit the /etc/apt/apt.conf file and add the following line.
apt-get proxy configuration Read More »