[vagrant@localhost shell]$ sed -i ‘s/\r//’ hello
[vagrant@localhost shell]$ ./hello yoshida
hello yoshida
#!/bin/bash
echo "hello $1"
$1, $2などを使う
#!/bin/bash
echo "hello $1"
echo $0
echo $#
echo $@
[vagrant@localhost shell]$ sed -i ‘s/\r//’ hello
[vagrant@localhost shell]$ ./hello a aa aaa
hello a
./hello
3
a aa aaa
ユーザーからの入力を受け取る
#!/bin/bash
read -p "名前: " name
echo "hello ${name}"
[vagrant@localhost shell]$ ./hello
名前: 田中
hello 田中
なんじゃこりゃーー
#!/bin/bash
read -p "Pick 3 colors: " c1 c2 c3
echo $c1
echo $c2
echo $c3
[vagrant@localhost shell]$ ./hello
Pick 3 colors: red geen blue
red
geen
blue
配列
#!/bin/bash
colors=(red blue pink)
colors[1]=silver
colors+=(green orange)
echo ${colors[@]}
[vagrant@localhost shell]$ sed -i ‘s/\r//’ hello
[vagrant@localhost shell]$ ./hello
red silver pink green orange
数値計算
#!/bin/bash
echo $((5 + 2))
n=10
((n=n + 2))
echo $n
if文
read -p "Name? " name
if [ "$name" = "yoshida" ]
then
echo "welcome"
else
echo "you are not allowed"
fi
[vagrant@localhost shell]$ ./hello
Name? yoshida
welcome
#!/bin/bash
read -p "Name? " name
if [ "$name" = "yoshida" ]
then
echo "welcome"
elif [ "$name" = "kobayashi" ]
then
echo "welcome, too"
else
echo "you are not allowed"
fi
[vagrant@localhost shell]$ sed -i ‘s/\r//’ hello
[vagrant@localhost shell]$ ./hello
Name? kobayashi
welcome, too
[vagrant@localhost shell]$ ./hello
Name?
empty …
ファイルを比較
#!/bin/bash
if [[ -f $0 ]]; then
echo "file exists ..."
fi
[vagrant@localhost shell]$ sed -i ‘s/\r//’ hello
[vagrant@localhost shell]$ ./hello
file exists …