In this blog you will learn List of commands. The list of top commands helps to get advanced access and details about the programs we use regularly. 1 List All Available Packages

 $ apt-cache pkgnames 

2 Package Name and Description of Software?

 $ apt-cache search apache 

3 Check Package Information?

 $ apt-cache show bash 

4 Check Dependencies for Specific Packages?

 $ apt-cache showpkg bash 

5 Check statistics of Cache

 $ apt-cache stats 

6 How to Update System Packages

 $ sudo apt-get update 

7 How to Upgrade Software Packages

 $ sudo apt-get upgrade 

8 Unconcerned of whether software packages will be added or removed to fulfill dependencies, use the ‘dist-upgrade‘ sub command.

 $ sudo apt-get dist-upgrade 

9 I Install or Upgrade Specific Packages?

 $ sudo apt-get install netcat 

10 How I can Install Multiple Packages?

 $ sudo apt-get install nethogs goaccess 

11 How to install Packages without Upgrading

 $ sudo apt-get install packageName --no-upgrade 

12 How to Upgrade Only Specific Package ?

 $ sudo apt-get install packageName --only-upgrade 

13 How Do I Install Specific Package Version?

 $ sudo apt-get install vsftpd=2.3.5-3ubuntu1 

14 How Do I Remove Packages Without Configuration

 $ sudo apt-get remove vsftpd 

15 How Do I Completely(configuration files) Remove Packages

 $ sudo apt-get purge vsftpd 

16 Remove Packages both at same time

 $ sudo apt-get remove --purge vsftpd 

17 How I Can Clean Up Disk Space

 $ sudo apt-get clean 

18 How Do I Download Only Source Code of Package

 $ sudo apt-get --download-only source vsftpd 

19 How Can I Download and Unpack a Package

 $ sudo apt-get source vsftpd 

20 How Can I Download, Unpack and Compile a Package

 $ sudo apt-get --compile source goaccess 

21 How Do I Download a Package Without Installing

 $ sudo apt-get download nethogs 

22 How Do I Check Change Log of Package?

 $ sudo apt-get changelog vsftpd 

23 How Do I Check Broken Dependencies?

 $ sudo apt-get check 

24 How Do I Search and Build Dependencies?

 $ sudo apt-get build-dep netcat 

25 How I Can Auto clean Apt-Get Cache?

 $ sudo apt-get autoclean 

26 How I Can Auto remove Installed Packages?

 $ sudo apt-get autoremove vsftpd 

27 Install a Package

 $ dpkg -i flashpluginnonfree_2.8.2+squeeze1_i386.deb 

28 List all the installed Packages

 $ dpkg -l 

29 To view a specific package installed or not

 $ dpkg -l apache2 
 $ which apache2 

30 Remove a Package

 $ dpkg -r flashpluginnonfree 
 $ udo dpkg --remove -force --force-remove-reinstreq PACKAGE_NAME_GOES_HERE
 $ apt-get remove package_name

31 You can also use ‘p‘ option in place of ‘r’ which will remove the package along with configuration file

 $ dpkg -p flashpluginnonfree 

32 View the Content of a Package

 $dpkg -c flashplugin-nonfree_3.2_i386.deb

33 Check a Package is installed or not

 $ dpkg -s flashplugin-nonfree 

34 Check the location of Packages installed

 $ dpkg -L flashplugin-nonfree 

35 Install all Packages from a Directory

 $ dpkg -R --install debpackages/ 

36 Unpack the Package but dont’ Configure

 $ dpkg --unpack flashplugin-nonfree_3.2_i386.deb 

37 Reconfigure a Unpacked Package

 $ dpkg --configure flashplugin-nonfree 

38 Replace available Package information

 $ dpkg –-update-avail package_name 

39 Erase Existing Available information of Package

 $ dpkg –-clear-avail 

40 Forget Uninstalled and Unavailable Packages

 $ dpkg --forget-old-unavail 

41 Display dpkg Licence

 $ dpkg --licence 

42 Display dpkg Version

 $ dpkg –version 

43 Get all the Help about dpkg

 $ dpkg –help