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Hands-on Basic Linux Commands: #Day3 of 90DaysofDevOps

Task: What is the Linux command to:

1. To view what's written in a file.

Viewing the Contents of a File: You can use the cat command to see what's written in a file. For example:

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2. To change the access permissions of files.
To modify the access permissions of files, you can use the chmod command. For instance:

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  1. chmod +rwx filename to add permissions

  2. chmod -rwx directoryname to remove permissions.

  3. chmod +x filename to allow executable permissions.

  4. chmod -wx filename to take out write and executable permissions.

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There are three options for permission groups available to you in Linux.

owners: these permissions will only apply to owners and will not affect other groups.

groups: you can assign a group of users specific permissions, which will only impact users within the group.

users: these permissions will apply to all users, and as a result, they present the greatest security risk and should be assigned with caution.

There are three kinds of file permissions in Linux:

Read (r): Allows a user or group to view a file.

Write (w): Permits the user to write or modify a file or directory.

Execute (x): A user or group with execute permissions can execute a file or view a directory.

3. To check which commands you have run till now.

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4. To remove a directory/ Folder.

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5. To create a fruits.txt file and to view the content.

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6. Add content in devops.txt (One in each line) - Apple, Mango, Banana, Cherry, Kiwi, Orange, Guava.

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7. Show only the top three fruits from the file.

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8. Show only the bottom three fruits from the file.

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9. To create another file Colors.txt and to view the content.

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10. Add content in Colors.txt (One in each line) - Red, Pink, White, Black, Blue, Orange, Purple, Grey.

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11. To find the difference between fruits.txt and Colors.txt files.

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