UNIX Shell Script

出自KMU Wiki

目錄 1 動機 2 Variable 3 Flow control 4 Sub Program 5 Examples

動機

為什麼要學 Shell Script

• automatic (自動化)
• batch (批次)

Variable

YOURVAR=some
MYVAR=thing
echo $YOURVAR
echo ${YOURVAR}${MYVAR}

Flow control

if [ -f your_file ]; then
    echo "your_file exist"
fi

for f in a b c
do
    echo $f
done

Sub Program

sub()
{
    echo $1 $2 $3
}
sub X Y Z

Examples

#!/bin/sh
exec < $1
while read line
    echo $line
done