Which command would you use to check the current system uptime on a Linux server?

The command used to check the current system uptime on a Linux server is 'uptime'. This command provides an output that details how long the system has been running since its last boot, along with the number of users currently logged in and the average load on the system over the past 1, 5, and 15 minutes. It is a simple yet effective way for system administrators to quickly assess the operational state and performance of the server.

The other options do not accurately provide this information. 'Status' is not a standard command for checking uptime and might refer to various system status commands depending on the context. 'Checkup' is not a recognized command in Linux for uptime or system health checks. 'Sysinfo' may exist in some distributions but typically does not provide the uptime directly. Thus, 'uptime' stands out as the correct and standard command for this purpose.