In the Linux system,/etc directory there is such a file passwd, this file contains all the user information system, records, record where each user that contains the following information: user name, password, user ID, group ID, user' s full name , the user' s home directory and the user logged in with the shell. Please design a script (shell) program enables to add, delete, search and display information on a specific user function. You can by creating a number of UNIX/LINUX shell script file to meet the above requirements.

123\Cai\addu
...\...\addu~
...\...\delp
...\...\delu
...\...\menu
...\...\menu~
...\...\passwd
...\...\temp.sh
...\...\.menu.swp
...\...\passwd~
...\...\modu
...\...\temp
...\...\temp1
...\...\delu~
...\shell大作业文档.doc
...\Cai
123

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