CompTIA Linux+ Exam Survival Guide

Window: Global | Admin-level Linux | 90 Q / 90 min

Must-do topics

• Commands: ls, grep, find, tar, chmod/chown, ps/top/kill, systemctl
• Users & groups; file permissions; ACLs
• Networking: ifconfig/ip, netstat, firewalld, SSH
• Storage: partitions, LVM, mount, fstab, swap
• Security: SELinux/AppArmor basics, sudoers, encryption
• Scripting: bash basics, cron/systemd timers
• Troubleshooting: boot logs, dmesg, journalctl

Top traps (avoid)

• Mixing absolute vs relative permissions
• Forgetting SELinux/AppArmor modes (enforcing/permissive/disabled)
• Using wrong package manager (rpm vs dpkg vs apt)
• Misconfiguring fstab (boot fails)

Time split

• 90 min → ~1 min/Q
• Two-pass: easy command recall → scenario configs

Last-48h checklist

• Common service/systemctl commands
• User mgmt + sudoers syntax
• Log commands (journalctl, tail, grep)
• Cron timing format

Quick facts

• chmod 755 = rwxr-xr-x
• systemctl enable/disable/start/status
• SELinux: enforcing = block; permissive = log only
• df -h = disk usage; du -sh * = folder size

Speed tactics

• Eliminate Windows-only distractors
• Recall defaults (e.g., /etc/passwd, /etc/shadow)
• For tricky perms, write out rwx table

Day-of mini-plan

• Warm-up: 10 command flashcards
• Keep pace: 30 Q every 30 min
• Leave 5 min buffer to recheck flagged