Tasks done by shell

Whenever we type any text in the shell terminal, it is the responsibility of shell to execute the command properly. The activities done by shell are as follows:

• Reading text and parsing the entered command
• Evaluating metacharacters such as wildcards, special characters, or history characters
• Process io-redirection, pipes, and background processing
• Signal handling
• Initializing programs for execution

We will discuss the preceding topics in the subsequent chapters.