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Re: RES: [shell-script] Shell Script
From: |
Thobias Salazar Trevisan |
Subject: |
Re: RES: [shell-script] Shell Script |
Date: |
Mon, 12 May 2003 10:28:34 -0300 (BRT) |
ae,
On Mon, 12 May 2003, Vitor Alexandre S. Marinho wrote:
> #!/bin/bash
> cat /proc/meminfo | grep Mem: > /home/vitor/result
> mem=`cat /home/vitor/result | cut -c7-15`
> valor=$mem/1048576
> echo "Essa máquina tem $valor MB de memória RAM"
>
> Porem, como faço pra resolver uma expressão matematica?
> Tipo a variavel valor da o seguinte resultado:
> 128012288/1048576
Use o bc.
$ valor='128012288/1048576
$ echo $valor
128012288/1048576
$ echo $valor | bc
122
$ echo '10*10' | bc
100
$ echo '10/3' | bc
3
$ echo 'scale=2;10/3' | bc
3.33
falow
thobias
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echo 9446046325380026818553633794429812592304650P | dc
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http://www.lcp.coppe.ufrj.br/~thobias
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