Which command is used to display I/O wait times in Linux?

The command that effectively displays I/O wait times in Linux is iostat. This command provides detailed statistics regarding system input/output device loading. It helps in monitoring the I/O performance of your system by reporting the percentage of time the CPU spends waiting for I/O operations to complete. This is crucial for diagnosing performance issues, as high I/O wait times can indicate disk bottlenecks or over-utilized disks.

While other commands, like vmstat, can show overall system metrics, including CPU performance and memory usage, they do not provide the granular detail specific to disk I/O that iostat offers. Similarly, top and htop are tools designed for real-time monitoring of system processes and resource usage but are not specifically tailored to I/O statistics. Thus, iostat stands out as the most relevant choice for displaying I/O wait times due to its focus on input/output device statistics.