"System Administrator" is just that a general sysadmin that more than likely is only certified to use Windows Server and is network-savvy. Whereas a Linux System Administrator is certified in Linux and networking.
Not much difference at all; Administrative tasks in different Unix systems can be done in different ways as well. Linux systems are the same way. In general, the tasks are done in a similar fashion in both Linux and Unix, including the types of tasks an administrator would perform in either.
Systems Administrator :)
Generally, only when there was a critical security vulnerability or bugfix.
The Linux administrator is called the "root" user.
Linux administration is a short course on how to become Linux administrator. In Linux administration, you may learn how to run Linux in advanced, learn the Linux techniques and troubleshooting.
Linux System Administrator's Guide was created in 2005.
Linux Network Administrator's Guide was created in 2005.
what are similarities and differences between linux and unix?
What is the difference between Redhat Linux EL4 and EL5.
A Linux system administrator can verify that the Linux system is forwaring IPV4 packets by querying the sysctl kernel to see if forwarding is enabled.
Microsoft Word is a word processor. Linux is a family of operating systems.
C programming is just that no matter if the operating system is Windows or Linux. Operating systems usually have an Application Program Interface that is commonly known as an API. The APIs of Windows will be different than Linux because the operating systems are (very) different.
Windows uses 4 file systems: FAT, NTFS, exFAT, and ReFS. "Linux" supports dozens of file systems, there are too many to mention. The differences between them are massive and specific to the file system in question. For a proper answer you need to read http://en.wikipedia.org/wiki/File_system . It is incorrect to say "the Linux file system is faster than Windows" because it's dependent on the data, and of course because there is no "Linux file system." It's incorrect to say "The Linux filesystem is more/less secure than the Windows file system" for the same reason. Drive encryption is available in both Windows and Linux. To the average user, there is no functional difference.