Restore using recovery mode. If you've never synced with iTunes or set up Find My iPhone in iCloud, you'll need to use recovery mode to restore your device. This will erase the device and its passcode. 1  Connect your iOS device to your computer and open iTunes.
So if you have a .deb file: 1  You can install it using sudo dpkg -i /path/to/deb/file followed by sudo apt-get install -f. 2  You can install it using apt-get install package_name. 3  Install gdebi and open your .deb file using it (Right-click -> Open with).
If a package is available on your Red Hat Linux or Fedora Core CDROM, there's an Add/Remove Applications application that is useful. It is invoked via,Add/Remove Applications. It will ask you for the root password, and once that is provided, it will display all applications that may be installed.f you want to install a downloaded RPM or DEB file manually, it can be performed like, # rpm-ivh xargs.rpm. or. # dpkg-i xargs.deb. And if you're manually upgrading a package, use, # rpm-Uvh xargs.rpm. The above command will upgrade the package if it is already installed or install it if it is not.