Chapter Summary

   

In this chapter, you learned more features of the POSIX shell. The chapter started with a brief comparison of capabilities of widely used shells in UNIX. A brief note on the subshell was the next topic. You used the ulimit command to limit use of system resources. The POSIX shell feature of file name completion was presented next. Here you learned how you can use the graphics/esc.gif and graphics/equal.gif keys to complete partially typed file names . You used the history and r commands to list and execute previous commands. You also used command line editing features and learned that the EDITOR environment variable controls which editor commands will be used for command line editing. Another POSIX shell feature is substitution, where you found some examples of variable, command, and tilde substitution. After learning how to set terminal parameters, you moved to job control. Here you created foreground jobs, suspended them, and moved them to the background. You also learned how to bring background jobs to the foreground. The commands used here are the intrinsic shell commands. You used the jobs command to list current jobs, fg to bring a job to the foreground, bg to send a job to the background, and wait to wait for the completion of a particular job.

In the next two chapters, you will be learning shell programming, where you will write shell scripts and use flow control structure and shell loops to control the flow of your scripts.


   
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HP Certified
HP Certified: HP-UX System Administration
ISBN: 0130183741
EAN: 2147483647
Year: 2000
Pages: 390
Authors: Rafeeq Rehman

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