shell 中的单行注释和多行注释

1. 单行注释

众所周知,#  比如想要注释:echo “ni”

# echo "ni"

 

2. 多行注释:

法一:

: << !

语句1

语句2

语句3

语句4

!

例如:

linux101:/home/wsj # sh dian
ni
ni
ni
ni
ni
ni

linux101:/home/wsj # more dian
#!/bin/ksh
echo "ni"
echo "ni"
echo "ni"
echo "ni"
echo "ni"
echo "ni"

:<<!
echo "ni"
echo "ni"
echo "ni"
echo "ni"
echo "ni"
echo "ni"
echo "ni"
echo "ni"

!

法二:

: '

语句1

语句2

语句3

语句4

'

例如:

linux101:/home/wsj # sh dian
ni
ni
ni
ni
ni
ni

linux101:/home/wsj # more dian
#!/bin/ksh
echo "ni"
echo "ni"
echo "ni"
echo "ni"
echo "ni"
echo "ni"

: '
echo "ni"
echo "ni"
echo "ni"
echo "ni"
echo "ni"
echo "ni"
echo "ni"
echo "ni"

'

 2014-02-03-06补充:

法三:

if false; then

语句1

语句2

语句3

语句4

fi

linux101:/home/wsj # sh dian
ni
ni
ni
ni
ni
ni

linux101:/home/wsj # more dian
#!/bin/ksh
echo "ni"
echo "ni"
echo "ni"
echo "ni"
echo "ni"
echo "ni"

if false; then
echo "ni"
echo "ni"
echo "ni"
echo "ni"
echo "ni"
echo "ni"
echo "ni"
echo "ni"

fi

 

 法四:

: << 字符  #这里的字符可以是数字或者是字符都可以

语句1

语句2

语句3

语句4

字符                        

 

2014-09-10 教师节快乐,由chaosink哥们提供补充:

法五:

((0)) & {

语句1

语句2

语句3

}

你可能感兴趣的:(shell 中的单行注释和多行注释)