IKM System Administration Fundamentals 2

Question 1

What is the purpose of a cron job?

Accepted Answer

Schedule commands to run automatically at specified times

Answer

Monitor CPU temperature

Answer

Manage passwords

Answer

Compress logs manually

Question 2

What does /etc/passwd contain?

Accepted Answer

User account info: username, UID, GID, home directory, shell

Answer

Encrypted passwords

Answer

Password policies

Answer

Failed login logs

Question 3

What is the difference between hard and symbolic links?

Accepted Answer

Hard links point to the inode; symbolic links point to the file path

Answer

Hard links cross file systems

Answer

Symlinks cannot be created by users

Answer

No practical difference

Question 4

What does chmod do?

Accepted Answer

Change file access permissions

Answer

Change ownership

Answer

Change modification time

Answer

Change file name

Question 5

What is LVM used for?

Accepted Answer

Flexible disk storage by abstracting physical disks into logical volumes

Answer

Network volumes

Answer

Disk health monitoring

Answer

Disk encryption

Question 6

What is SSH key-based authentication?

Accepted Answer

Secure password-less authentication using public-private key pairs

Answer

Speed up connections

Answer

Encrypt DNS queries

Answer

Manage SSL certs