Increase system file descriptor limit linux

Set high FD limit for current session and persist it

ulimit -n 1048576 && echo '* soft nofile 1048576
* hard nofile 1048576' >> /etc/security/limits.conf

#linux #kernel #performance

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Show inode usage df -i Find large files find / -type f -size +100M 2>/dev/null | sort Show open file descriptors cat /proc/$(pgrep myapp)/fd | wc -l Check SELinux status getenforce List cron jobs (system) ls /etc/cron.* /var/spool/cron/crontabs/