Question

write a short research paper that sets out best practices in Linux system administration. To help you manage your paper, use the following key system administration functions:

• Physical Security
• Super user password
• Delegating Super user Tasks
• User password
• Restrict user
• Knowledge Update
• User Education
• Vulnerability Testing
• Backup and Disaster Recovery

more than 300 words

Answer 1

Physical Security --

The security features of the Linux kernel have evolved significantly to meet modern requirements, although Unix DAC remains as the core model.

• Network Security.
• Integrity Management.
• Extending Unix Security.
• POSIX Access Control Lists.
• POSIX Capabilities.
• SELinux.
• Smack.

Super user password --

Changing user passwords on Linux

• First sign on or “su” or “sudo” to the “root” account on Linux, run: sudo -i.
• Then type, passwd tom to change a password for tom user.
• The system will prompt you to enter a password twice

Restrict user --

This is a special kind of user account, which holds all kinds of permissions to do any alteration to a program or service of Linux. The su command is used to become a root or super user. Type the following command, and enter the root password to become a root or super user.

Knowledge Update --

In Linux, every file is associated with three types of permissionsread (r), write (w), and execute (x). The existing file permission can be changed by the owner of the file or the super user. The following command will embed a write permission to the group:

[bhargab@localhost~]$chmod g+w file1

Similarly, to give an execute permission to other users, use the command given below:

[bhargab@localhost~]$chmod o+x file1

In order to take away execute permissions from a group, type the following command:

[bhargab@localhost~]$chmod g-x file1

User Education --

There are two commands to create a file: touch and cat. The touchcommand simply creates an empty file. Type the following command to create an empty document:

[bhargab@localhost~]$touch file1

cat is used to create and view a file. Type the following command to create a file:

[bhargab@localhost~]$cat>file1

To view a file type, use the command given below:

[bhargab@localhost~]$cat file1

Delegating Super user Tasks --

The rmdir command is used to remove an empty directory, as shown below:

[bhargab@localhost~]$rmdir myDir

rmdir with the p option removes not only the specified directory but also parent directories.

[bhargab@localhost~]$rmdir p myDir

In the next article, well cover topics like user account management, process management, and more.