How to find Ubuntu which is already installed?
5413
How can I repair grub? (How to get Ubuntu back after installing Windows?)
117360
Check if the application is already installed
112884
How to see the details which Ubuntu shows at the time of login anytime?
19762
How to reset Ubuntu installation
87526
How can I list all applications installed in my system?
63514
How do I decide what version of Ubuntu to install?
8780
How can I find out in which distributions a package is available?
100609
How can I find and run an application that's already installed?
38812
Where are my installed applications?
77434
How to discover what Linux distribution is in use
51515
Where can I find the source code of Ubuntu?
67561
How do I find what packages I've installed via terminal?
108853
How to determine the "age" of a linux system since installation?
69489
How do I figure out what package something is in without resorting to Google?
80275
How to find location of installed library
4623
How do I get a list of installed files from a package?
41167
How do I get a list of installed printers?