o2image copies the OCFS2 file system meta -data from the device to the specified image -file. This image file contains the file system skeleton that includes the inodes, directory names and file names. It does not include any file data. This image file can be useful to debug certain problems that are not reproducible otherwise. Like on-disk corruptions. It could also be used to analyse the file system layout in an aging file system with an eye towards improving performance. As the image -file contains a copy of all the meta -data blocks, it can be a large file. By default, it is created in a packed format, in which all meta -data blocks are written back -to-back. With the -r option, the user could choose to have the file in the raw (or sparse) format, in which the blocks are written to the same offset as they are on the device. debugfs.ocfs2 understands both formats. Consider the features and capabilities of Kernel -based Virtual Machine (kvm). Which two statements are correct?
Examine the dtrace command: dtrace n syscall::read:entry Which two statements are true?
Examine this command and its output: # yum history list Loaded plugins: security history list Which command must you use to undo the last two yum transactions?
syscall::read:entry, syscall::write:entry /pid == $1/ { ts[probefunc] = timestamp; } syscall::read:return, syscall::write:return /pid == $1 && ts[probefunc] != 0/ { printf(“%d nsecs”, timestamp – ts[probefunc]); } Which statement is true about this script?
You have to meet these requirements: 1. Network services must run in a confined domain. 2. The guest user must be confined. 3. The guest user must not be allowed from using the su command. 4. Access to files and directories must be granted based only of the SELinux contexts. 5. The SELinux configuration must be persistent across system restarts. 6. Users must be able to publish private HTML content. You issued these commands: # setenforce enforcing # semanage login –d –s guest_u guest # setsebool –P httpd_enabled_homedirs on Which requirements do you meet?
➢ TOTAL QUESTIONS: 141 Examine the dtrace command: dtrace -P syscall Which statement is true about this command?
