On which part of the maintenance cycle do linux administrators spend the most time?

• 1. 

  On which part of the maintenance cycle do Linux administrators spend the most time?

  • A. 

    Monitoring

  • B. 

    Proactive maintenance

  • C. 

    Reactive maintenance

  • D. 

    Documentation

• 2. 

  Which of the following files is likely to be found in the /var/log/sa directory over time?

  • A. 

    15

  • B. 

    Sa39

  • C. 

    Sa19

  • D. 

    00

• 3. 

  Which of the following commands can be used to display memory statistics? (Choose all that apply.)

  • A. 

    Free

  • B. 

    Sar

  • C. 

    Vmstat

  • D. 

    Iostat

• 4. 

  Which command indicates the shared libraries required by a certain executable program?

  • A. 

    Ldconfig

  • B. 

    Ldd

  • C. 

    Rpm –V

  • D. 

    Slconfig

• 5. 

  Which directory must you be in to compile the Linux kernel?

  • A. 

    /lib/modules

  • B. 

    /usr/src/linux

  • C. 

    /lib/modules/(kernel-version)

  • D. 

    /usr/src/linux/(kernel-version)

• 6. 

  Which command can be used to create a ramdisk that will be used at boot time to load SCSI support?

  • A. 

    Mkramdisk

  • B. 

    Load ramdisk

  • C. 

    Image=ramdisk

  • D. 

    Mkinitrd

• 7. 

  Which command can be used to apply a patch to kernel source code?

  • A. 

    Patch

  • B. 

    P0patch

  • C. 

    Make patch

  • D. 

    Make patch_install

• 8. 

  When an application stops functioning, what should you try first?

  • A. 

    Restart the application.

  • B. 

    Research the solution using the Internet.

  • C. 

    Switch to Single User Mode.

  • D. 

    Kill all other applications running in memory.

• 9. 

  Which of the following steps is not a common troubleshooting procedure?

  • A. 

    Test the solution.

  • B. 

    Isolate the problem.

  • C. 

    Delegate responsibility.

  • D. 

    Collect information.

• 10. 

  You can recompile the kernel to ________________. (Choose all that apply.)

  • A. 

    Add support for a certain hardware device

  • B. 

    Remove support for a certain hardware device

  • C. 

    Change kernel features

  • D. 

    Improve system performance

• 11. 

  Which command can be used to insert a module into the Linux kernel? (Choose all that apply.)

  • A. 

    Insmod

  • B. 

    Rmmod

  • C. 

    Lsmod

  • D. 

    Modprobe

• 12. 

  Which files can be used to load modules upon system startup? (Choose all that apply.)

  • A. 

    /etc/modprobe.conf

  • B. 

    /etc/fstab

  • C. 

    /etc/modtab

  • D. 

    /etc/rc.d/rc.local

• 13. 

  Which of the following programs detects and installs new hardware detected at boot time?

  • A. 

    Insmod

  • B. 

    Kudzu

  • C. 

    Lba32

  • D. 

    LILO

• 14. 

  Which command can increase the number of filehandles that programs can open in a shell?

  • A. 

    Ldd

  • B. 

    Ulimit

  • C. 

    Lba32

  • D. 

    Top

• 15. 

  Which command can be used to create a system boot disk?

  • A. 

    Makeboot

  • B. 

    Bootdisk

  • C. 

    Mkboot

  • D. 

    Mkbootdisk

• 16. 

  What will the command sar –W 3 50 do?

  • A. 

    Take 3 swap statistics every 50 seconds.

  • B. 

    Take 50 swap statistics every 3 seconds.

  • C. 

    Take 3 CPU statistics every 50 seconds.

  • D. 

    Take 50 CPU statistics every 3 seconds.

• 17. 

  Which directory stores most modules on a Linux system?

  • A. 

    /lib/modules/(kernel-version)

  • B. 

    /usr/src/linux-(kernel-version)

  • C. 

    /usr/lib/modules/(kernel-version)

  • D. 

    /usr/src/linux

• 18. 

  When the fsck command cannot repair a nonroot filesystem, you should immediately restore all data from tape backup. True or False?

  • A. 

    True

  • B. 

    False

• 19. 

  When performing a sar –u command, you notice that %idle is consistently 10%; is this good or bad?

  • A. 

    Good, because the processor should be idle more than 5% of the time

  • B. 

    Good, because the processor is idle 90% of the time

  • C. 

    Bad, because the processor is idle 10% of the time and perhaps a faster CPU is required

  • D. 

    Bad, because the processor is idle 10% of the time and perhaps a new hard disk is required

• 20. 

  Which command can be used to modify the IRQ and I/O address settings of a serial device?

  • A. 

    Setserial

  • B. 

    Modserial

  • C. 

    Serial2K

  • D. 

    Lsmod

What are best practices for securing a Linux server choose all that apply?

What will the command SAR Â W 3 50 do?