How can you dynamically change the TCP keepalive time for active connections?
How do you view the value of a kernel module parameter for the nf_conntrack module and change its hashsize?
You need to persistently disable IPv6 on a RHEL server. How do you do this using kernel parameter tools?
How can you increase the size of the TCP read buffer to improve high-latency application performance?
You are troubleshooting dropped packets on a busy server. How can you increase the number of incoming network connections?A. See the Explanation for Step-by-Step answer. Explanation: 1. View current backlog size: cat /proc/sys/net/core/somaxconn 2. Temporarily increase it: sysctl -w net.core.somaxconn=1024 3. Make it persistent: Add to /etc/sysctl.conf: net.core.somaxconn = 1024 4. Apply the changes: sysctl -p
You suspect CPU resource contention on a RHEL 9 system. Use vmstat to monitor CPU usage and interpret the output to determine if the system is CPU-bound.
