System Information

Command	Description	Example
uname -a	Display kernel information.	uname -a → Outputs detailed system and kernel information.
uptime	Show system uptime.	uptime → Displays how long the system has been running.
free -h	Display memory usage in human-readable format.	free -h → Shows free and used memory with details.
df -h	Show disk space usage in human-readable format.	df -h → Displays available and used disk space on all mounted filesystems.
hostname	Display system hostname.	hostname → Outputs the name of the system.
dmesg	Print system boot messages.	dmesg → Shows kernel messages, useful for troubleshooting.