7.28 Jobs

1. Convert content in/etc/issue file to uppercase and save to/tmp/issue.out file

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2. Convert the current system login user's information to uppercase and save to the/tmp/who.out file

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3. A Linux user sends an email to root asking for the message titled "Help" with the following message body:

Hello, I am Username, the system version is here,pleasehelp me to check it, thanks!

Operating system Version Information

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6. Remove the ' ^m ' character from the Windows text file

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7, processing string "Xt.,l 1 jr#! $mn 2 c*/fe3 uz4", keep only the numbers and spaces

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8. Display the path variable in a separate row for each directory

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9. Delete blank lines of the specified file

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10. Display each word (letter) in the file in a separate line with no blank lines

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7.28 Jobs