Hi all Starting a Series of 1 Day 1 Command for beginners starts with vmstat command command: vmstat purpose: Reports virtual memory statistics. syntax: vmstat [ -f ] [ -i ] [ -s ] [ -I ] [ -t ] [ -v ] [ -w] [ -l ] [ { -p | -P } pagesize | ALL ] ALL ] [ PhysicalVolume ... ] [ Interval [ Count ] ] The vmstat command reports statistics about kernel threads, virtual memory, disks, traps and pocessor activity. Reports generated by the vmstat command can be used to balance system load activity examples: 1. To display a summary of the statistics since boot, enter: # vmstat 2. To display five summaries at 2-second intervals, enter: # vmstat 2 5 3. To display a summary of the statistics since boot including statistics for logical disks scdisk1 and scdisk2, enter: # vmstat scdisk1 scdisk2 4. To display fork statistics, enter: # vmstat -f 5. To display the count of various events, enter: # vmstat -s 6. To display time-stamp next to each column of output of vmstat, enter: # vmstat -t 7. To display the I/O oriented view with an alternative set of columns, enter # vmstat -I 8. To display the VMM statistics for all page sizes that are supported on the system, enter: # vmstat -p ALL 9. To display all the VMM statistics available, enter: # vmstat -vs file: /usr/bin/vmstat contains the vmstat command it is a performance tuning command regards, dhanasekar