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Commands Description
vmstat n Displays virtual memory statistics
vmstat -s Displays system event information
vmstat -S Displays swapping statistics
iostat n Displays general disk usage information
iostat -xtc Displays extended disk statistics
df -h Displays disk space information
sar -a Checks file access operation statistics
sar -b Checks buffer activity
sar -c Checks system call statistics
sar -d Checks disk activity
sar -r Checks unused memory