Cert Prep: CompTIA Linux+ (XK0-004)

Prepare to pass the CompTIA Linux+ certification exam (XKO-004). Review each of the key topics covered on the test, including configuration, security, and troubleshooting.

Introduction

• Prepare for the CompITA Linux+ certification
• What you should know
• About the Linux+ XKO-004 Exam
• CentOS 7 install
• CentOS 7 lab setup
• Ubuntu 19.04 install

1. System Hardware

• Understand the Linux bootup process
• Boot into the emergency target
• Update the kernel
• Manage kernel modules
• Configure live network connections
• Configure networking using files on Enterprise Linux
• Configure networking using NetworkManager
• Configure interface bonding

2. Disk Systems

• List, create, and delete partitions on MBR and GPT disks
• Create partitions using parted
• Resize partitions without losing data
• Manage LVM volumes and Volume Groups
• Extend existing logical volumes
• Reduce existing logical volumes
• Replace a physical volume
• Create EXT filesystems
• Repair EXT filesystems
• Create and repair XFS filesystems
• MDRAID or DMRAID?
• Create a RAID 5 using LVM
• Creating RAIDs using mdadm
• Back up and restore an EXT filesystem

3. Manage Users and Software

• Linux software management systems
• YUM overview
• Get package information with RPM
• Manage software with YUM
• Manage software groups with YUM
• Work with YUM repositories
• Get package information with dpkg and APT
• Manage software with dpkg and APT
• Work with APT repositories
• Install software from source
• Create and delete local user accounts
• Modify local user accounts

4. Server Infrastructure and Services

• Explain server roles
• Compare cloud and virtualization concepts
• Types of hypervisors
• Virtual host initialization and storage
• Locale and date tools
• Introduction to systemd services
• Get systemd service status
• Manage systemd services
• Make systemd services persistent
• Manage sysvinit services
• Manage one-time jobs with AT
• Manage reoccurring user jobs with cron
• Manage reoccurring system jobs with cron

5. GUI and Remote Access

• Explore Linux desktop choices
• GUI remote access
• Graphical server types
• Console redirection with SSH port forwarding

6. Create, Modify, and Redirect Files

• Understand file system paths
• Create files and dirs
• Copy files and dirs
• Move and rename files and dirs
• Remove files and dirs
• Create links to files and dirs
• An introduction to Vim
• Edit text in Vim
• Search and replace in Vim
• Named and unnamed Pipes
• Use input-output redirection (>, >>, |, 2>, etc.)
• Find files using Locate
• Finding files with Find
• Use grep and regular expressions to analyze text
• Archive files
• Compress files

7. File Security

• What is a file?
• Get file attributes
• Get extended attributes
• File and directory modes
• File ownership
• Set permissions using numeric method
• Set permissions using symbolic method
• Default permissions using umask
• Special file bits: SUID and SGID
• Special directory bits: SGID and Sticky
• Read access control lists
• Set access control lists
• Configure inheritance with default access control lists
• Delete access control lists

8. Mandatory Access Control

• List and identify SELinux file and process context
• Restore SELinux default file contexts
• Use Booleans to modify SELinux behavior
• Diagnose routine SELinux policy violations
• Maintaining security context when managing files
• Using AppArmor

9. System Security

• Configure access and authentication using PAM
• Using pam_tally2
• Change default password policies
• Lock user accounts and change password aging
• Implementing SSH keypairs for authentication
• Deny access using TCP Wrappers
• Restrict access to TTY consoles
• Summarize security best practices

10. Linux Firewalls

• Compare and contrast Linux firewalls
• Use firewalld for packet filtering
• Use firewalld zones
• Use firewalld for NAT
• Create dynamic rules

11. System Logging

• Locate and interpret system log files
• Reading the system journal
• Rsyslog filters
• Rsyslog actions
• Rotating log files

12. Backup, Restore, and Compress Files

• Backup and restore an EXT filesystem
• Archiving files with tar and cpio
• Compressing files

13. System Monitoring

• Monitor the network and remediate
• Analyze system processes and optimize
• Troubleshoot applications and hardware
• Troubleshoot DNS client issues

14. Version Control

• Installing Git on Fedora/CentOS
• Configuring Git
• Creating a local repository
• Committing and adding files
• Creating branches
• Merging branches
• Creating a GitHub repository
• Cloning a remote GitHub repository
• Get and push to a remote repository

15. Automation and Scripting

• What makes a shell script a shell script
• Positional arguments
• File globbing
• Wildcards
• Bash variable scope
• Outputting to STDOUT and STDERR
• Pipe data into a script
• Conditional flow with if, then if
• Conditional flow with case
• Numeric conditions
• String conditions
• File conditions
• For loop
• While loop

16. System Orchestration

• Utilize configuration management systems
• Infrastructure and build automation

Conclusion

• Taking the exam