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1. ÔËÓÃ expr
#expr 10 + 10 ===> 20
#a=`expr 10 % 3`;echo $a ===> 1; a, k6 [+ N%
#|/ }4 [% N
# b=10;b=`expr $b + 1` ===> 11 (ʵÏÖÁ˱äÁ¿µÄ×ÔÔö1)
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#! /bin/sh
VAR=1
VAR=$(($VAR+1))
echo $VAR
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sysinitÖÐ:
echo “Make jffs2 filesystem:”
erase /dev/mtd5
cd /tmp
echo “test” > test.txt
mkfs.jffs2 –d /tmp > /dev/mtdblock5
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Filesystem Handling
Like every traditional Unix system, Linux makes use of a system 's root file ......