判断文件是否存在特定字符串

lemoneer

如何判断一个文件里面是否有特定的字符串
比如我有一个temp文件。
如果内容含有Hello Would则echo “Hello Would”
如果内容不含有Hello Would则echo “Hello China”

haimming

1. 
   
2. [rockfall@tmp]$cat b
   
3. cannt
   
4. it
   
5. eandg
   
6. test
   
7. is
   
8. aaa
   
9. bbb
   
10. [rockfall@tmp]$cat a
    
11. this is a test!
    
12. Hello Would
    
13. [rockfall@tmp]$grep -q "Hello Would" a && echo "Hello Would" || echo "Hello China"
    
14. Hello Would
    
15. [rockfall@tmp]$grep -q "Hello Would" b && echo "Hello Would" || echo "Hello China"
    
16. Hello China
    
17. [rockfall@tmp]$
    
18. 
    

复制代码

飞鸿无痕

grep "Hello Would" temp && echo "Hello Would" || echo "Hello China"

飞鸿无痕

原帖由 haimming 于 2009-3-2 17:27 发表

[rockfall@tmp]$cat b
cannt
it
eandg
test
is
aaa
bbb
[rockfall@tmp]$cat a
this is a test!
Hello Would
[rockfall@tmp]$grep -q "Hello Would" a && echo "Hello Would" || echo "Hello China ...

没看你的答案，嘿嘿！

lemoneer

谢谢各位高手
grep -q 确实很好用。
刚刚用了，完全OK~

飞鸿无痕

原帖由 lemoneer 于 2009-3-2 17:44 发表
谢谢各位高手
grep -q 确实很好用。
刚刚用了，完全OK~

确实，呵呵，很少用那个选项，刚好学习了！