ulimit.sh

#!/bin/bash

# Set limits in /etc/security/limits.conf
echo "* soft nofile 100000" | sudo tee -a /etc/security/limits.conf
echo "* hard nofile 100000" | sudo tee -a /etc/security/limits.conf

# Configure systemd limits
echo "DefaultLimitNOFILE=100000" | sudo tee -a /etc/systemd/system.conf
echo "DefaultLimitNOFILE=100000" | sudo tee -a /etc/systemd/user.conf

# Ensure PAM applies limits
grep -q "pam_limits.so" /etc/pam.d/common-session || echo "session required pam_limits.so" | sudo tee -a /etc/pam.d/common-session
grep -q "pam_limits.so" /etc/pam.d/common-session-noninteractive || echo "session required pam_limits.so" | sudo tee -a /etc/pam.d/common-session-noninteractive

# Apply changes to systemd
sudo systemctl daemon-reexec
sudo systemctl daemon-reload

# Set limit in ~/.bashrc for user sessions
echo "ulimit -n 100000" >> ~/.bashrc
source ~/.bashrc

ulimit -n 100000
# Verify the new limit
echo "Updated file descriptor limit: $(ulimit -n)"