There are multiple vendors of Unix. These include IBM, Hewlett-Packard, Apple, and Oracle.
LINUX and UNIX are vendor independent OS
Depending on the Unix vendor, there is usually a 'spell' or 'ispell' command available to spell check words in a file.
Different versions of Unix use different methods of page replacement depending on situations; there is no one size fits all. You will need to check for the specific version of Unix you are interested in and ask the vendor.
Costs for a Unix license vary by vendor and number of users on the system. Most new system hardware comes bundled with at least a 2 user license. It can get very expensive depending on the vendor and the bundled products. I've seen Unix versions on mainframes that are upwards of 20,000 dollars a year, and some server based versions that are under $1000.
Sun Microsystem's Solaris operating system is Unix. Solairs comes with virtually every command that is found in other modern Unix systems. Each commercial version of Unix (whether AIX, Unicos, Solaris, HP UX or another) usually has one or more vendor specific commands included that do not appear in versions of Unix from other vendors or in open source implementations. It is doubtful that Sun Solaris has 500 commands that do not appear in some form in other versions of Unix, though as I haven't used Sun Solaris in several years, I suppose this is possible, though unlikely. Typically, the vendor specific commands in various historic versions of Unix have numbered fewer than dozen or two and often have been no more than a handful. IBM's AIX is perhaps the exception to this with probably the most prolific proliferation of vendor specific commands of any commercial version of Unix. Nevertheless, it is unlikely that even AIX has 500 vendor specific commands and likely fewer than 100 or so. [JMH]
In general Linux has no restrictions on the number of users in a server. Commercial Unix vendors vary in what they allow by licensing, so it depends on the vendor.
You need to talk to your administrator, vendor, or ISP to see what servers are available to you.
Network+ is officially a "vendor neutral" certification. However, a candidate for the designation is expected to have knowledge about Windows Server 2003 and Unix/Linux servers.
It depends on the Unix vendor. For example, in HPUX you will find them in the section 1m area.
UUCP is the abbriviation of Unix to Unix copy. It is worldwide email system called UUCP or Unix to Unix copy.This email system was developed for the operating system called Unix.
No, but Linux is based on Unix since Linux is a Unix clone.
Unix work is performed by users of the unix system, for application and system programs, or anything that requires a Unix system.