Security limits to prevent fork bombs and more.
These are security limits I normally use as a starting point on Debian LAMP servers.
Open /etc/security/limits.conf for editing and set limits. Please note that is advised to avoid changing any values that are already set to a bigger number than listed below.
# 2048 is a fair number * soft nofile 2048 * hard nofile 65536 * soft nproc 2048 * hard nproc 16384 * soft locks 2048 * hard locks 2048 * soft stack 10240 * hard stack 32768 * - maxlogins 50 # Soft limit 32GB, hard 64GB * soft fsize 33554432 * hard fsize 67108864 # Disable core dumps for all users * hard core 0 # Defaults * soft memlock 64 * hard memlock 64 # Limits for root root soft nofile 2048 root hard nofile 65536 root soft nproc 2048 root hard nproc 16384 root soft stack 10240 root hard stack 32768 root soft fsize 33554432
Once you save file, you need to logout and login again for changes to take effect.