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Calculo com variáveis


From: williansantunes
Subject: Calculo com variáveis
Date: Tue, 13 Feb 2007 18:27:16 -0000
User-agent: eGroups-EW/0.82

Olá pessoal,

Estou com a seguinte necessidade. Preciso obter o resultado da
expressão  abaixo:

topmem = ((memtotal -(memfree+buffree))/memtotal)*100

as variáveis foram declaradas assim:

memtotal=`head -2 saida.out |tail -1 |awk '{print $2}'`
memused=`head -2 saida.out |tail -1 |awk '{print $3}'`
memfree=`head -2 saida.out |tail -1 |awk '{print $4}'`

bufused=`head -3 saida.out |tail -1 |awk '{print $3}'`
buffree=`head -3 saida.out |tail -1 |awk '{print $4}'`

swaptotal=`head -4 saida.out |tail -1|awk '{print $2}'`
swapused=`head -4 saida.out |tail -1|awk '{print $3}'`
swapfree=`head -4 saida.out |tail -1|awk '{print $4}'`


Qual a melhor maneira de fazer isso? BC? Expr? outra ?

Abraços! E desde já muito obrigado!

Willians



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