CompTIA Linux+ XK0-005 Exam Objectives PDF

CompTIA Linux+ Certification Exam Objectives EXAM NUMBER: XK0-005  About the Exam Candidates are encouraged to use this document help prepare for the CompTIA Linux+ XK0-005 certification exam. The CompTIA Linux+ certification exam will verify the successful candidate has the know...

CompTIA Linux+ Certification Exam Objectives EXAM NUMBER: XK0-005  About the Exam Candidates are encouraged to use this document help prepare for the CompTIA Linux+ XK0-005 certification exam. The CompTIA Linux+ certification exam will verify the successful candidate has the knowledge and skills required configure, manage, operate, and troubleshoot Linux on-premises and cloud-based server environments, while using security best practices, scripting, containerization, and automation. This is equivalent to at least 12 months of hands-on experience working with Linux servers in a junior Linux support engineer or junior cloud/DevOps support engineer job role. These content examples are meant to clarify the test objectives and should not be construed as a comprehensive listing of all the content of this examination. EXAM ACCREDITATION The CompTIA Linux+ exam is accredited by ANSI to show compliance with the ISO 17024 standard and, as such, undergoes regular reviews and updates to the exam objectives. EXAM DEVELOPMENT CompTIA exams result from subject-matter expert workshops and industry-wide survey results regarding the skills and knowledge required of an entry-level IT professional. CompTIA AUTHORIZED MATERIALS USE POLICY CompTIA Certifications, LLC is not affiliated with and does not authorize, endorse, or condone utilizing any content provided by unauthorized third-party training sites (aka “brain dumps”). Individuals who utilize such materials in preparation for any CompTIA examination will have their certifications revoked and be suspended from future testing in accordance with the CompTIA Candidate Agreement. In an effort tomore clearly communicate CompTIA’s exam policies on use of unauthorized study materials, CompTIA directs all certification candidates to the CompTIA Certification Exam Policies. Please review all CompTIA policies before beginning the study process for any CompTIA exam. Candidates will be required to abide by the CompTIA Candidate Agreement. If a candidate has a question as towhether study materials are considered unauthorized (aka “brain dumps”), he/she should contact CompTIA at [email protected] to confirm. PLEASE NOTE The lists of examples provided in bulleted format are not exhaustive lists. Other examples of technologies, processes, or tasks pertaining to each objective may also be included on the exam although not listed or covered in this objectives document. CompTIA is constantly reviewing the content of our exams and updating test questions to be sure our exams are current, and the security of the questions is protected. When necessary, we will publish updated exams based on existing exam objectives. Please know that all related exam preparation materials will still be valid. CompTIA Linux+ Certification Exam Objectives 1.0 (Exam Number: XK0-005)  TEST DETAILS Required exam XK0-005 Number of questions Maximum of 90 Types of questions Multiple-choice and performance-based Length of test 90 minutes Recommended experience 1 2 months of hands-on experience working with Linux servers, as well as A+, Network+, and Server+ or similar certifications and/or knowledge Passing score 720 (on a scale of 100 to 900) EXAM OBJECTIVES (DOMAINS) The table below lists the domains measured by this examination and the extent to which they are represented. DOMAIN PERCENTAGE OF EXAMINATION 1.0 System Management 32% 2.0 Security 21% 3.0 Scripting, Containers, and Automation 19% 4.0 Troubleshooting 28% Total 100% CompTIA Linux+ Certification Exam Objectives 1.0 (Exam Number: XK0-005)  1.0 System Management 1.1 Summarize Linux fundamentals. F  ilesystem Hierarchy Basic boot process  B  asic package compilation Standard (FHS) - Basic input/output system (BIOS) from source - /boot - Unified Extensible Firmware - ./configure - /proc Interface (UEFI) - make - /sys - Commands - make install - /var mkinitrd Storage concepts - /usr grub2-install - File storage - /lib grub2-mkconfig - Block storage - /dev grub2-update - Object storage - /etc dracut - Partition typo - /opt - initrd.img Master boot record (MBR) - /bin - vmlinuz GUID [globally unique identifier] - /sbin - Grand Unified Bootloader Partition Table (GPT) - /home version 2 (GRUB2) - Filesystem in Userspace (FUSE) - /media - Boot sources - Redundant Array of - /mnt Preboot eXecution Independent (or Inexpensive) - /root Environment (PXE) Disks (RAID) levels - /tmp Booting from Universal Striping Serial Bus (USB) Mirroring Booting from ISO Parity Kernel panic Listing hardware information Device types in /dev - lspci - Block devices - lsusb - Character devices - dmidecode - Special character devices /dev/null /dev/zero /dev/urandom CompTIA Linux+ Certification Exam Objectives 1.0 (Exam Number: XK0-005)  1.0 | System Management 1.2 Given a scenario, manage files and directories. File editing File metadata File and directory operations - sed - stat - mv - awk - file - cp - printf Soft and hard links - mkdir - nano Copying files between systems - rmdir - vi(m) - rsync - ls File compression, - scp - pwd archiving, and backup - nc - rm - gzip - cd - bzip2 -. - zip -.. - tar -~ - xz - tree - cpio - cat - dd - touch 1.3 Given a scenario, configure and manage storage using the appropriate tools. D isk partitioning M onitoring storage space Inspecting RAID implementations - Commands and disk usage - mdadm fdisk - df - /proc/mdstat parted - du Storage area network (SAN)/ partprobe Creating and modifying network-attached storage (NAS) Mounting local and remote devices volumes using Logical - multipathd - systemd.mount Volume Manager (LVM) - Network filesystems - /etc/fstab - Commands Network File System (NFS) - mount pvs Server Message Block - Linux Unified Key Setup (LUKS) vgs (SMB)/Common Internet - External devices lvs File System (CIFS) Filesystem management lvchange Storage hardware - XFS tools lvcreate - lsscsi - Ext4 tools vgcreate - lsblk - Btrfs tools lvresize - blkid pvcreate - fcstat vgextend CompTIA Linux+ Certification Exam Objectives 1.0 (Exam Number: XK0-005)  1.0 | System Management 1.4 Given a scenario, configure and use the appropriate processes and services. S ystem services P  rocess management - Process states - systemctl - Kill signals Zombie stop SIGTERM Sleeping start SIGKILL Running restart SIGHUP Stopped status - Listing processes and open files - Job control enable top bg disable ps fg mask lsof jobs Scheduling services htop Ctrl+Z - cron - Setting priorities Ctrl+C - crontab nice Ctrl+D - at renice - pgrep - pkill - pidof 1.5 Given a scenario, use the appropriate networking tools or configuration files. Interface management N  ame resolution N etwork monitoring - iproute2 tools - nsswitch - tcpdump ip - /etc/resolv.conf - wireshark/tshark ss - systemd - netstat - NetworkManager hostnamectl - traceroute nmcli resolvectl - ping - net-tools - Bind-utils - mtr ifconfig dig Remote networking tools ifcfg nslookup - Secure Shell (SSH) hostname host - cURL arp - WHOIS - wget route - nc - /etc/sysconfig/network-scripts/ - rsync - Secure Copy Protocol (SCP) - SSH File Transfer Protocol (SFTP) CompTIA Linux+ Certification Exam Objectives 1.0 (Exam Number: XK0-005)  1.0 | System Management 1.6 Given a scenario, build and install software. P  ackage management S  andboxed applications System updates - DNF - snapd - Kernel updates - YUM - Flatpak - Package updates - APT - AppImage - RPM - dpkg - ZYpp 1.7 Given a scenario, manage software configurations. U  pdating configuration files C  onfigure kernel options C onfigure common system services - Procedures - Parameters - SSH Restart service sysctl - Network Time Protocol (NTP) Reload service /etc/sysctl.conf - Syslog -.rpmnew - Modules - chrony -.rpmsave lsmod Localization Repository configuration files imsmod - timedatectl /etc/apt.conf rmmod - localectl /etc/yum.conf insmod /etc/dnf/dnf.conf modprobe /etc/yum.repo.d modinfo /etc/apt/sources.list.d CompTIA Linux+ Certification Exam Objectives 1.0 (Exam Number: XK0-005)  2.0 Security 2.1 Summarize the purpose and use of security best practices in a Linux environment. M  anaging public key C ertificate use cases L  inux hardening infrastructure (PKI) certificates -S  ecure Sockets Layer (SSL)/ - Security scanning - Public key Transport Layer Security (TLS) - Secure boot - Private key - Certificate authentication UEFI - Self-signed certificate - Encryption - System logging configurations - Digital signature Authentication - Setting default umask - Wildcard certificate - Tokens - Disabling/removing - Hashing - Multifactor authentication (MFA) insecure services - Certificate authorities -P  luggable authentication - Enforcing password strength modules (PAM) - Removing unused packages -S  ystem Security Services - Tuning kernel parameters Daemon (SSSD) - Securing service accounts -L  ightweight Directory - Configuring the host firewall Access Protocol (LDAP) - Single sign-on (SSO) 2.2 Given a scenario, implement identity management. A  ccount creation and deletion A  ccount management - Utilities - passwd useradd - chage groupadd - pam_tally2 userdel - faillock groupdel - /etc/login.defs usermod groupmod id who w - Default shell - Configuration files /etc/passwd /etc/group /etc/shadow /etc/profile /etc/skel.bash_profile.bashrc CompTIA Linux+ Certification Exam Objectives 1.0 (Exam Number: XK0-005)  2.0 | Security 2.3 Given a scenario, implement and configure firewalls. F  irewall use cases C  ommon firewall technologies Key firewall features - Open and close ports - firewalld - Zones - Check current configuration - iptables - Services - Enable/disable Internet - nftables - Stateful protocol (IP) forwarding - Uncomplicated firewall (UFW) - Stateless 2.4 Given a scenario, configure and execute remote connectivity for system management. SSH E  xecuting commands - Configuration files as another user /etc/ssh/sshd_config - /etc/sudoers /etc/ssh/ssh_config - PolicyKit rules ~/.ssh/known_hosts - Commands ~/.ssh/authorized_keys sudo /etc/ssh/sshd_config visudo /etc/ssh/ssh_config su – ~/.ssh/config pkexec - Commands ssh-keygen ssh-copy-id ssh-add - Tunneling X11 forwarding Port forwarding Dynamic forwarding 2.5 Given a scenario, apply the appropriate access controls. File permissions A ppArmor - Access control list (ACL) - Application permissions - Set user ID (SUID) Command-line utilities - Set group ID (SGID) - chown - Sticky bit - umask Security-enhanced Linux (SELinux) - chmod - Context permissions - getfacl - Labels - setfacl Autorelabel - ls - System booleans - setenforce - States - getenforce Enforcing - chattr Permissive - lsattr Disabled - chgrp - Policy types - setsebool Targeted - getsebool Minimum - chcon - restorecon - semanage - audit2allow CompTIA Linux+ Certification Exam Objectives 1.0 (Exam Number: XK0-005)  3.0 Scripting, Containers, and Automation 3.1 Given a scenario, create simple shell scripts to automate common tasks. S  hell script elements Common script utilities - Loops - Standard stream redirection awk while | sed for || find until > xargs - Conditionals >> grep if < egrep switch/case