bash 综合应用time swap
1、Statistic of
Time for CommandExcutation
Count the time of mkdir 100 dir.
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#! /bin/bash time do mkdir /home/nick/nick$i done
time do mkdir /home/nick/nick$i done
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2、Get Swap Memory Size of Local Machine
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#! /bin/bash
free -m | sed -n 's/Swap: */([0-9]*/) */([0-9]*/)
free -m | sed -n '/Swap/p' | awk '{print $2}' |
There are one blank before every blue starsymbol.
SED replace command format is like this:
Sed –n ‘s/source/target/p’
And adopt the special “/( /)”.
SED search command format is like this:
Sed –n ‘/condition/p’
AWK command format is like this:
Awk ‘condition{action}’
And the index begin with 1.
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[nick@d01 bash]$ ./free.sh 1983 0 1983 [nick@d01 bash]$ free -m total Mem: 3792 -/+ buffers/cache: 464 Swap: 1983 |