A Linux administrator needs to remove all local firewall rules on a Linux system. Which of the following commands should the administrator run?
The iptables -F command flushes all the firewall rules, effectively removing them from the system. This command clears out all existing rules from all chains (INPUT, OUTPUT, and FORWARD), leaving the system with no active iptables rules.
Users are reporting that a Linux server is responding slowly. A systems administrator troubleshooting the server issue sees the following iostat output, with %iowait at 50.38. Which of the following is most likely the issue?
The %iowait value represents the percentage of time the CPU is waiting for I/O operations to complete. A high %iowait value suggests the system is bottlenecked by disk I/O, which could lead to slow response times. Addressing disk I/O bottlenecks would improve performance.
An administrator is running a web server in a container named web, but none of the error output is not showing. Which of the following should the administrator use to generate the errors on the container?
A technician just fixed a few issues in some code and is ready to deploy the code into production. Which of the following steps should the technician take next?
Due to performance issues on a server, a Linux administrator needs to terminate an unresponsive process. Which of the following commands should the administrator use to terminate the process immediately without waiting for a graceful shutdown?
SIGKILL is used to immediately terminate a process without allowing it to clean up. It does not give the process a chance to gracefully shut down, which is what's needed in the case of an unresponsive process.
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