LINKS

1. Regex
   Regular Expression, or regex or regexp in short, is extremely and amazingly powerful in searching and manipulating text strings, particularly in processing text files. One line of regex can easily replace several dozen lines of programming codes. This website can help you to learn regex.

2. PGP
   Pretty Good Privacy (PGP) is an encryption system used for both sending encrypted emails and encrypting sensitive files. This website can help you to understand how PGP works.

3. File Allocation Methods
   File allocation methods define how the files are stored in the disk blocks. This website can give you simple overview of file allocation methods.

4. Tarball
   A tarball or tarfile is name of group or archive of files that are bundled together using the tar command. This website can help you to make and encrypt tarball.

5. Virtual Memory
   Virtual memory is a memory management technique where secondary memory can be used as if it were a part of the main memory. This website can help you to understand how virtual memory works.

6. fork() in C
   Fork system call is used for creating a new process, which is called child process, which runs concurrently with the process that makes the fork() call (parent process). This website can help you to understand how fork() works.

7. Mutex
   Mutex (mutual exclusion) is a property of concurrency control, which is instituted for the purpose of preventing race conditions. It is the requirement that one thread of execution never enters a critical section while a concurrent thread of execution is already accessing critical section. This website can help you to understand mutex better by giving an example of mutex usage.

8. Scheduling Algorithms
   A Process Scheduler schedules different processes to be assigned to the CPU based on particular scheduling algorithms. This website can help you to understand how various scheduling algorithms work.