ソフトウェアエンジニアの技術ブログ：Software engineer tech blog

#!/bin/sh

for var in 0 1 2 3 4
do
	echo $var
done

[vagrant@localhost tests]$ sed -i ‘s/\r//’ test.sh
[vagrant@localhost tests]$ ./test.sh
0
1
2
3
4

{0..5}とも書ける。」

#!/bin/sh

for var in {0..5}
do
	echo $var
done

function

#!/bin/sh

MyFunction(){
	echo "display function"
}
MyParamFunc(){
	echo "parm1:$1 param2:$2"
}

MyFunction
MyParamFunc 5 4

[vagrant@localhost tests]$ sed -i ‘s/\r//’ test.sh
[vagrant@localhost tests]$ ./test.sh
display function
parm1:5 param2:4

with linux command

#!/bin/sh

index=1
for file in *.txt
do
	mv "$file" "mytxt${index}.txt"
	index=`expr $index + 1`
done

[vagrant@localhost tests]$ sed -i ‘s/\r//’ test.sh
[vagrant@localhost tests]$ ./test.sh

すげええええええええええええええええええええええええ

#!/bin/sh

a=0
while [ $a -lt 5 ]
do
	echo $a
	a=`expr $a + 1`
done

[vagrant@localhost tests]$ sed -i ‘s/\r//’ test.sh
[vagrant@localhost tests]$ ./test.sh
0
1
2
3
4

‘と`の違いで手古摺った.

#!/bin/sh

a=0
until [ ! $a -lt 5 ]
do
	echo $a
	a=`expr $a + 1`
done

#!/bin/sh

DRINK="beer"
case "$DRINK" in
	"beer") echo "this is beer"
	;;
	"juice") echo "that is juice"
	;;
	"coak") echo "Do not drink it"
	;;
esac

[vagrant@localhost tests]$ sed -i ‘s/\r//’ test.sh
[vagrant@localhost tests]$ ./test.sh
this is beer

esacとか、使い慣れてないなー

#!/bin/sh

if [ "$1" -gt "$2" ]
then
	echo "1番目の引数が2番目の引数より大きい"
elif [ "$1" -eq "$2" ]
then
	echo "1番目の引数と2番目の引数は同じです"
else
	echo "1番目の引数が2番目の引数より小さい"
fi

[vagrant@localhost tests]$ sed -i ‘s/\r//’ test.sh
[vagrant@localhost tests]$ ./test.sh 5 4
1番目の引数が2番目の引数より大きい

Variable Function
$0 script name
Access $1 ～ $9 arguments, $1 for the first argument, $2 for the second argument

$ # number of arguments given to the script
$ * treat all arguments together as one
$ @ Thread all arguments as separate
$? End value of the last executed command (0 is success, 1 is failure)
$$ Process ID of this shell script
$! last executed background process ID

#!/bin/sh

echo "\$0 (スクリプト名)：　$0"
echo "\$1 (1番目の引数)：　$1"
echo "\$2 (2番目の引数)：　$2"
echo "\$# (引数の数)：　$#"
echo "\"\$*\": \"$*\""
echo "\"\$@\": \"$@\""
VAR="exit値は0になるはずです"
echo $?

[vagrant@localhost tests]$ sed -i ‘s/\r//’ test.sh
[vagrant@localhost tests]$ ./test.sh
$0 (スクリプト名)：　./test.sh
$1 (1番目の引数)：　
$2 (2番目の引数)：　
$# (引数の数)：　0
“$*”: “”
“$@”: “”
0