Lab 1
1. During the install, the option to sync with NTP (Network Time Protocol) server was checked. From a security perspective, why is it important for a system to keep accurate time?
UNIX systems base their notion of time on interrupts generated by the hardware clock. Delays in processing these interrupts because UNIX systems clocks to lose time slowly but erratically. These small changes in timekeeping are what the time scientist call jitter. The Time protocol provided a server's notion of time in a machine readable format, and there is also an ICMP Timestamp message
2. During the install, a password has been set for the “root” user. What is the “root “user, and when it is appropriate to user this account.
The root user is the administrator of the account. You will use this account only when you are making important changes in the system.
3. During the install, X-Window and a Desktop Manager were installed. However, in a production environment it is recommended NOT to run the X-Window environment. Explain the purpose of this recommendation.
During Linux installation, deselecting X Window packages, especially the base packages, will return errors concerning failed dependencies. You can safely deselect all of these applications, in addition to X itself.
4. During the installation process it asks what the options given to create the partition are? Name them. Ext 2 and Ext 4
5. Why is it important to partition a Linux system correctly?
For security. Once a disk is divided into several partitions, directories and files of different categories may be stored in different partitions.
6. What is the significance of the SWAP partition in a Linux system? What different ways can the swap space be configured and why would you recommend one over the other?
For server (web) performance. Swap space is an area on a disk that temporarily holds a process memory image. When physical memory demand is sufficiently low, process memory images are brought back into physical
UNIX systems base their notion of time on interrupts generated by the hardware clock. Delays in processing these interrupts because UNIX systems clocks to lose time slowly but erratically. These small changes in timekeeping are what the time scientist call jitter. The Time protocol provided a server's notion of time in a machine readable format, and there is also an ICMP Timestamp message
2. During the install, a password has been set for the “root” user. What is the “root “user, and when it is appropriate to user this account.
The root user is the administrator of the account. You will use this account only when you are making important changes in the system.
3. During the install, X-Window and a Desktop Manager were installed. However, in a production environment it is recommended NOT to run the X-Window environment. Explain the purpose of this recommendation.
During Linux installation, deselecting X Window packages, especially the base packages, will return errors concerning failed dependencies. You can safely deselect all of these applications, in addition to X itself.
4. During the installation process it asks what the options given to create the partition are? Name them. Ext 2 and Ext 4
5. Why is it important to partition a Linux system correctly?
For security. Once a disk is divided into several partitions, directories and files of different categories may be stored in different partitions.
6. What is the significance of the SWAP partition in a Linux system? What different ways can the swap space be configured and why would you recommend one over the other?
For server (web) performance. Swap space is an area on a disk that temporarily holds a process memory image. When physical memory demand is sufficiently low, process memory images are brought back into physical