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Lab 4.3 - Priorities and Nice Values

Objectives​

  • Understand nice values
  • Adjust priorities with nice and renice
  • Manage CPU-intensive processes

Exercise 1: Nice Values​

# View current nice
nice

# Launch with nice value
nice -n 10 sleep 100 &
nice -n -10 sleep 200 &  # High priority (requires sudo)

# View nice values
ps -eo pid,ni,cmd | head -10

Exercise 2: renice​

# Launch a process
sleep 300 &
PID=$!

# Change priority
renice 10 $PID

# By user
sudo renice -5 -u $USER

Lab created on: December 2024 - Tested on Ubuntu 24.04