For the most part, every Unix-based and Unix-like (and by extension, Linux) distribution will have a root account (equivalent to a system administrator account in Windows). The remaining accounts will be allocated for the users and for certain applications.
Yes.
By default,there is only one account, root. However, most Linux distribution will either allow or make you set up a second administrative user account.
You can't recover passwords in Linux; you can only reset the passwords on various accounts.
Yes, as long as they have user accounts on both machines.
The operating system included with this Netbook is HP Mobile Internet, which is built on Linux. So, yes, this Netbook is compatible with Linux.
Built-in users and user groups are predefined accounts and collections of accounts in operating systems that facilitate access control and management. For example, in Windows, the built-in users include Administrator and Guest, while user groups like Users, Administrators, and Power Users help manage permissions for multiple accounts. In Linux, common built-in users include root and nobody, with groups like wheel and users serving similar purposes. These structures simplify user management and enhance security by organizing permissions based on roles.
You do not need to install PuTTY in Linux as there are built-in utilities that can do PuTTY's job (ssh, telnet)
There are an abundant amount of securities in Linux, and most Linux distributions. It would take an extremely long time to list out every "Security" in Linux, as it's built around securities.
there is no "linux operating system". linux is merely a kernel that operating systems can be built upon, of which there are dozens if not hundreds
With most Unix-derived systems, "root" is the super-user account.
Linux is an operating system on which a wide array of system distributions (Such as Ubuntu and Android.) are built.
Linux is an operating system on which lots of system distributions, such as Ubuntu, Android, Chrome OS, Archlinux, are built.