shell 常规操作

#!/bin/sh
awk '
BEGIN { flag="none"; }
/^[ \t]*if/        {
        flag="if";
        print NR
            next;
}
/^[ \t]*if/        {
        flag="if";
        print yy  NR
}
' wqx_src1.sh

wqx_src1.sh

#!/bin/sh
echo "开始"
read key
 if [ $key = "test" ]
then
if
then
}  echo "好的"
else
        echo "不好"
fi
       

for语句

#!/bin/bash
for var in A B C; do
    echo "var is $var"
done

将内容写到另一个文件中
#!/bin/bash
echo "nihao" > old.sh