Master Comptia-Linux+ System Management with our interactive study cards designed for effective learning. These flashcards use proven spaced repetition techniques to help you memorize key concepts, definitions, and facts. Perfect for students, professionals, and lifelong learners seeking to improve knowledge retention and ace exams through active recall practice.
Click any card to reveal the answer
ps or ps aux for detailed view
top or htop
Running instance of a program with its own memory space and resources
Background process that runs continuously providing system services
SIGKILL - forcefully terminates a process immediately
SIGTERM - requests graceful process termination (default)
pstree
init or systemd (PID 1)
Process ID - unique identifier assigned to each running process
Parent Process ID - ID of the process that spawned the current process
nice (for starting) and renice (for running processes)
-20 (highest priority) to 19 (lowest priority)
Modern system and service manager for Linux initialization and service management
systemctl
systemctl start servicename
systemctl enable servicename
systemctl status servicename
systemctl stop servicename
Configuration file defining how systemd manages services
/etc/systemd/system/ and /usr/lib/systemd/system/
Tool for installing updating and removing software packages
apt and dpkg
yum or dnf and rpm
apt update or apt-get update
apt upgrade or apt-get upgrade
yum install packagename or dnf install packagename
apt search packagename or apt-cache search packagename
apt remove packagename
apt purge packagename
rpm -qa or yum list installed
Server containing software packages for installation
Edit /etc/apt/sources.list or add file to /etc/apt/sources.list.d/
top htop or vmstat
free -h (human-readable format)
df -h (human-readable format)
du -sh directoryname
Disk space used as virtual memory when RAM is full
free -h or swapon --show
journalctl (systemd) or viewing /var/log/ files
Service for scheduling recurring tasks at specific times
Configuration file defining scheduled cron jobs for users
crontab -e
minute hour day month weekday command
Service for running periodic tasks on systems not always running
uptime
who or w
Average number of processes waiting for CPU over time periods
1-minute 5-minute and 15-minute averages
useradd userdel usermod
useradd username or adduser username
userdel username (userdel -r removes home directory too)
passwd username
Remember: Use all available resources to study. Flearn alone cannot guarantee success in any exams—make sure to supplement your learning!