How can I find out if a specific program is installed in ubuntu

	e,g, Chromium, Run in terminal chromium-browser if it's install, it will be open. If it's not you will get chromium-browser: command not found To check whether a package is install also dpkg -l | grep chromium-browser You will get like this if it is installed: To listing all installed packages, just use dpkg -l OR Use Ubuntu Software Center type chromium If you see the green icon like this:

For a graphical view, open the Software Centre, and click on the Installed button at the top: You may want to click the Show X technical items button if you're interested in system stuff, but Chromium would be there on the list anyway. If you want a command line solution, then dpkg is your friend: $ dpkg -l Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Description +++-==============-==============-============================================ ii accountsservic 0.6.14-1git1ub query and manipulate user account informatio ii acl 2.2.51-3 Access control list utilities ii acpi-support 0.138 scripts for handling many ACPI events ii acpid 1:2.0.10-1ubun Advanced Configuration and Power Interface e ii acroread 9.4.6~enu-0one Adobe Reader ii acroread-commo 9.4.6~enu-0one Adobe Reader - Common Files ii adduser 3.112+nmu1ubun add and remove users and groups ii adium-theme-ub 0.3.1-0ubuntu1 Adium message style for Ubuntu ii aisleriot 1:3.2.1-0ubunt Solitaire card games ii alacarte 0.13.2-2ubuntu easy GNOME menu editing tool ii alsa-base 1.0.24+dfsg-0u ALSA driver configuration files ii alsa-utils 1.0.24.2-0ubun Utilities for configuring and using ALSA ..........