linux command explanation

1 how Concatenate data so that it will be displayed on a single line every time the script is executed. for example we have script has df command and top 2 Explain how to add script to the cron so that it can be automatically executed at a specific time interval; for example, every 5 minutes. Demonstrate your testing process supported using annotated screenshots. 3 Research and test different utilities that can be used to create user accounts; for example, useradd, adduser and luseradd. Discuss and justify the utility chosen for your automated script. i used useradd explain why this is important for your automated solution 4 Research additional techniques in order to help with formatting, for example using awk and sed. 5Research, test and present different utilities to check the file size of the root directory. Examples of utilities include ls, du and df. Test these commands at the shell using supporting annotated screenshots. 6 Use chosen command in conjunction with other utilities to focus on relevant details. Utilities include pipe, redirect and awk. 7 Explain different strategies to inform the administrator if the root file size is greater than 50%. Examples of utilities for sending direct messages include using wall and write, and sending emails using utilities such as sendmail, mail, mutt, sSMTP and telnet.