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When you use the pipe symbol ( | ), ensure that you put spaces before and after and enter a command after it. For example, if you enter 5| (without spaces before and after), it is interpreted as 5\| and becomes an invalid option.
Expert Mode > sar 1 5| Usage: sar [ options ] [ <interval> [ <count> ] ] Options are: [ -A ] [ -b ] [ -B ] [ -C ] [ -d ] [ -h ] [ -m ] [ -p ] [ -q ] [ -r ]
[ -R ] [ -S ] [ -t ] [ -u [ ALL ] ] [ -v ] [ -V ] [ -w ] [ -W ] [ -y ] [ -I { <int> [,...] | SUM | ALL | XALL } ] [ -P { <cpu> [,...] |
ALL } ] [ -n { <keyword> [,...] | ALL } ] [ -o [ <filename> ] | -f [ <filename> ] ] [ -i <interval> ] [ -s [ <hh:mm:ss> ] ] [ -e [ <hh:mm:ss> ] ]
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