Multi-core CPUs pack multiple processors into a single chip thus allowing multiple threads to run at once. Most of the time, this is a good thing. But at times, for example, when you need to run some legacy applications that are not compatible with multi-core processing, you may be required to disable the cores.
An ISO image is a disk image file of an optical disc. The format of the disc is defined by the International Organization for Standardization (ISO).
ISO 9660 is the most commonly used optical disc file system. An ISO image can also contain UDF file system which is backwards compatible with ISO 9660.
Ubuntu Linux distribution, by default, disables the root account. To run a command with root privileges, sudo has to be used before the command.
When the disk partition is filling up quickly, it’s quite an hassle for the system administrator to find out the location of the files taking up the most space.
On a typical Fedora installation, you are asked for a root password and you will given an option to create accounts for normal users.
On the other hand, Ubuntu only allows account creation for normal users, root logins are disabled by default.