Open a terminal by pressing CTRL+ALT+T and enter id
This lists the groups you belong to.
If you are using Ubuntu 12.04 or later then look for the group sudo in earlier versions the group was admin. If you are shown as being in this group you are a system administrator and can run commands with administrator privileges. If not then you will need to ask an administrator to either make you an administrator too or do what you want
An administrator can make you one too by running sudo adduser username sudo
or sudo adduser username admin
as appropriate for the version of Ubuntu you have replacing username with your user name.
If you are already an administrator then to run a program with a GUI with admin privileges press ALT+F2 to open the command line and type gksu
or gksudo
followed by the name of the program you want to run. For example gksu nautilus
runs the filemanager. gksudo is just a link to gksu
so both commands are equivalent.
For command line applications then prefix the command with sudo
you will be asked to enter your password. There is no feedback when you type but it is being acceped.
For the specific example of installing preload the command is
sudo apt-get install preload
This is explained in more detail in the RootSudo - Community Ubuntu Documentation
If, by mistake, you have something like in /usr/share/polkit-1/actions/org.debian.apt.policy
file:
...
<action id="org.debian.apt.install-or-remove-packages">
<description gettext-domain="aptdaemon">Install or remove packages</description>
<message gettext-domain="aptdaemon">To install or remove software, you need to authenticate.</message>
<defaults>
<allow_any>no</allow_any>
<allow_inactive>no</allow_inactive>
<allow_active>no</allow_active>
</defaults>
</action>
...
you will get the following warning when you try to install something from Ubuntu Software Center:
You can check also the details from the warning.
So, check /usr/share/polkit-1/actions/org.debian.apt.policy
file and be sure that is looking like this:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE policyconfig PUBLIC
"-//freedesktop//DTD PolicyKit Policy Configuration 1.0//EN"
"http://www.freedesktop.org/standards/PolicyKit/1.0/policyconfig.dtd">
<policyconfig>
<vendor>Apt Daemon</vendor>
<vendor_url>http://launchpad.net/aptdaemon/</vendor_url>
<icon_name>package-x-generic</icon_name>
<action id="org.debian.apt.get-trusted-vendor-keys">
<description gettext-domain="aptdaemon">List keys of trusted vendors</description>
<message gettext-domain="aptdaemon">To view the list of trusted keys, you need to authenticate.</message>
<defaults>
<allow_any>auth_admin</allow_any>
<allow_inactive>auth_admin</allow_inactive>
<allow_active>auth_admin_keep</allow_active>
</defaults>
</action>
<action id="org.debian.apt.clean">
<description gettext-domain="aptdaemon">Remove downloaded package files</description>
<message gettext-domain="aptdaemon">To clean downloaded package files, you need to authenticate.</message>
<defaults>
<allow_any>auth_admin</allow_any>
<allow_inactive>auth_admin</allow_inactive>
<allow_active>yes</allow_active>
</defaults>
</action>
<action id="org.debian.apt.change-config">
<description gettext-domain="aptdaemon">Change software configuration</description>
<message gettext-domain="aptdaemon">To change software settings, you need to authenticate.</message>
<defaults>
<allow_any>auth_admin</allow_any>
<allow_inactive>auth_admin</allow_inactive>
<allow_active>auth_admin_keep</allow_active>
</defaults>
</action>
<action id="org.debian.apt.change-repository">
<description gettext-domain="aptdaemon">Change software repository</description>
<message gettext-domain="aptdaemon">To change software repository settings, you need to authenticate.</message>
<defaults>
<allow_any>auth_admin</allow_any>
<allow_inactive>auth_admin</allow_inactive>
<allow_active>auth_admin_keep</allow_active>
</defaults>
</action>
<action id="org.debian.apt.install-file">
<description gettext-domain="aptdaemon">Install package file</description>
<message gettext-domain="aptdaemon">To install this package, you need to authenticate.</message>
<defaults>
<allow_any>auth_admin</allow_any>
<allow_inactive>auth_admin</allow_inactive>
<allow_active>auth_admin_keep</allow_active>
</defaults>
</action>
<action id="org.debian.apt.update-cache">
<description gettext-domain="aptdaemon">Update package information</description>
<message gettext-domain="aptdaemon">To update the software catalog, you need to authenticate.</message>
<defaults>
<allow_any>auth_admin</allow_any>
<allow_inactive>auth_admin</allow_inactive>
<allow_active>yes</allow_active>
</defaults>
</action>
<action id="org.debian.apt.install-or-remove-packages">
<description gettext-domain="aptdaemon">Install or remove packages</description>
<message gettext-domain="aptdaemon">To install or remove software, you need to authenticate.</message>
<defaults>
<allow_any>auth_admin</allow_any>
<allow_inactive>auth_admin</allow_inactive>
<allow_active>auth_admin_keep</allow_active>
</defaults>
</action>
<action id="org.debian.apt.install-packages.high-trust-repo">
<description gettext-domain="aptdaemon">Install software from a high-trust whitelisted repository.</description>
<message gettext-domain="aptdaemon">To install software, you need to authenticate.</message>
<defaults>
<allow_any>auth_admin</allow_any>
<allow_inactive>auth_admin</allow_inactive>
<allow_active>auth_admin_keep</allow_active>
</defaults>
</action>
<action id="org.debian.apt.install-packages-from-new-repo">
<description gettext-domain="aptdaemon">Add a new repository and install packages from it</description>
<message gettext-domain="aptdaemon">To install software from a new source, you need to authenticate.</message>
<defaults>
<allow_any>auth_admin</allow_any>
<allow_inactive>auth_admin</allow_inactive>
<allow_active>auth_admin_keep</allow_active>
</defaults>
</action>
<action id="org.debian.apt.install-purchased-packages">
<description gettext-domain="aptdaemon">Add a new repository of purchased software and install packages from it</description>
<message gettext-domain="aptdaemon">To install purchased software, you need to authenticate.</message>
<defaults>
<allow_any>auth_admin</allow_any>
<allow_inactive>auth_admin</allow_inactive>
<allow_active>auth_admin_keep</allow_active>
</defaults>
</action>
<action id="org.debian.apt.upgrade-packages">
<description gettext-domain="aptdaemon">Upgrade packages</description>
<message gettext-domain="aptdaemon">To install updated software, you need to authenticate.</message>
<defaults>
<allow_any>auth_admin</allow_any>
<allow_inactive>auth_admin</allow_inactive>
<allow_active>auth_admin_keep</allow_active>
</defaults>
</action>
<action id="org.debian.apt.cancel-foreign">
<description gettext-domain="aptdaemon">Cancel the task of another user</description>
<message gettext-domain="aptdaemon">To cancel someone else's software changes, you need to authenticate.</message>
<defaults>
<allow_any>auth_admin</allow_any>
<allow_inactive>auth_admin</allow_inactive>
<allow_active>auth_admin</allow_active>
</defaults>
</action>
<action id="org.debian.apt.set-proxy">
<description gettext-domain="aptdaemon">Set a proxy for software downloads</description>
<message gettext-domain="aptdaemon">To use a proxy server for downloading software, you need to authenticate.</message>
<defaults>
<allow_any>auth_admin</allow_any>
<allow_inactive>auth_admin</allow_inactive>
<allow_active>auth_admin</allow_active>
</defaults>
</action>
</policyconfig>
To edit it, switch to the root user in terminal with:
sudo -i
then run the following command:
gedit /usr/share/polkit-1/actions/org.debian.apt.policy
and close that root session with CTRLD or by typing exit
.
Best Answer
Search for Sol in dash
Once it opens, click on game, and choose select game. when it opens navigate to freecell, and select it.
Or start it from terminal as the bkd.online stated in his answer.