关于脚本语言中if判断的问题

[Little_yan]

代码： 全选

 1 #!/bin/bash
  2 #Program:
  3 #       This program shows using netstat and grep to detect WWW,SSHH,FTP,and            Mail services ports
  4 #History:
  5 #2013/05/04 13:48       yan     ninth release
  6 
  7 PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
  8 export PTAH
  9 
 10 testing=$ (netstat -tuln | grep ":80 ")
 11 if [ "$testing" != "" ];
 12 then
 13         echo "WWW is running in your system"
 14 fi
 15 testing=$ (netstat -tuln | grep ":22 ")
 16 if [ "$testing" != "" ];
 17 then
 18         echo "SSH is running in your system"
 19 fi
 20 testing=$ (netstat -tuln | grep ":21 ")
 21 if [ "$testing" != "" ];
 22 then
 23         echo "FTP is running in your system"
 24 fi
 25 testing=$ (netstat -tuln | grep ":25 ")
 26 if [ "$testing" != "" ];
 27 then
 28         echo "Mail is running in your system"
 29 fi

[/size]
想问问 第10行那个括号里的语法错了吗？我对着书写的说
错误的提示是这样的：
sh09.sh: line 10: syntax error near unexpected token `('
sh09.sh: line 10: `testing=$ (netstat -tuln | grep ":80 ")'
求高手帮忙, 要如何修改

[YeLee]

[bash]
#!/bin/bash
#Program:
# This program shows using netstat and grep to detect WWW,SSHH,FTP,and Mail services ports
#History:
#2013/05/04 13:48 yan ninth release

PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PTAH

testing=$(netstat -tuln | grep ":80 ")
if [ "$testing" != "" ];
then
echo "WWW is running in your system"
fi
testing=$(netstat -tuln | grep ":22 ")
if [ "$testing" != "" ];
then
echo "SSH is running in your system"
fi
testing=$(netstat -tuln | grep ":21 ")
if [ "$testing" != "" ];
then
echo "FTP is running in your system"
fi
testing=$(netstat -tuln | grep ":25 ")
if [ "$testing" != "" ];
then
echo "Mail is running in your system"
fi

[/bash]
亲，下次贴代码的时候，能否先弄掉一些^\s*[0-9]*之类的东西啊，我的编辑器里面有高亮的，只要你代码没缺行多行便行。
至于你的那个问题呢？不知能否让那$跟括号不要离得太远了，尤其不要用空格隔着，隔着个空白符他们就找不到对方了。

[Little_yan]

[bash]
#!/bin/bash
#Program:
# This program shows using netstat and grep to detect WWW,SSHH,FTP,and Mail services ports
#History:
#2013/05/04 13:48 yan ninth release

PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PTAH

testing=$(netstat -tuln | grep ":80 ")
if [ "$testing" != "" ];
then
echo "WWW is running in your system"
fi
testing=$(netstat -tuln | grep ":22 ")
if [ "$testing" != "" ];
then
echo "SSH is running in your system"
fi
testing=$(netstat -tuln | grep ":21 ")
if [ "$testing" != "" ];
then
echo "FTP is running in your system"
fi
testing=$(netstat -tuln | grep ":25 ")
if [ "$testing" != "" ];
then
echo "Mail is running in your system"
fi

[/bash]
亲，下次贴代码的时候，能否先弄掉一些^\s*[0-9]*之类的东西啊，我的编辑器里面有高亮的，只要你代码没缺行多行便行。
至于你的那个问题呢？不知能否让那$跟括号不要离得太远了，尤其不要用空格隔着，隔着个空白符他们就找不到对方了。

不好意思～怕太小看不清～
谢谢你～又再次帮助我解决问题～
这样有学到东西了～

[leofun]

想问问楼主是在跟着哪本书在学习脚本呢？推荐给我看看，我也打算学学脚本的

[Little_yan]

想问问楼主是在跟着哪本书在学习脚本呢？推荐给我看看，我也打算学学脚本的

其实我也是看网上推荐的 我看 鸟哥的Linux私房菜 这本书
希望对你有帮助