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Need help in Regular expression in bash shell

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Top Forums Shell Programming and Scripting Need help in Regular expression in bash shell
# 8  
Old 07-26-2010
@Zaxxon,

I want to match exactly XX.XX.XX.XX only 4 sets.

@ygemici,

The one which you gave is also giving other lines.

Code:
ex2.sh

echo "Hai........"
abdfkljk 110.111.111.11 kjdkjjkjdk
11.11.1.1111
3.23.AS.AA
24.DD.DD.DD
ab.cd.df.rf
/usr/bin
jhhh 12.12.AV.12	
abcdjhds /usrwww/bin/hhhhk kdjkdjkdj
/urf/sss/kk kkk

Code:
grep -rn '[0-9a-fA-F][0-9a-fA-F].\{4\}'  ex2.sh

1:echo "Hai........"
2:abdfkljk 110.111.111.11 kjdkjjkjdk
3:11.11.1.1111
4:3.23.AS.AA
5:24.DD.DD.DD
6:ab.cd.df.rf
8:jhhh 12.12.AV.12
10:abcdjhds /usrwww/bin/hhhhk kdjkdjkdj

The result should be only

5:24.DD.DD.DD
8:jhhh 12.12.AV.12
# 9  
Old 07-26-2010
Code:
# grep -rn '[0-9a-f][0-9a-f]\.[0-9a-f][0-9a-f]\.[0-9a-f][0-9a-f]\.' macfile
2:here is a mac address 00.30.05.be.c5.bc ok?
5:another 00.30.05.be.c5.b1 ok?



---------- Post updated at 04:57 PM ---------- Previous update was at 04:53 PM ----------

Code:
 
# grep -rn '[0-9A-F][0-9A-F]\.[0-9A-F][0-9A-F]\.[0-9A-F][0-9A-F]\.' ex2.sh
5:24.DD.DD.DD

8:jhhh 12.12.AV.12

V is not a hexadecimal character Smilie
Last edited by ygemici; 07-26-2010 at 11:03 AM..
# 10  
Old 07-26-2010
Sorry ..........



If suppose ex2.sh file content is



Code:
 

echo "Hai........"
abdfkljk 110.111.111.11 kjdkjjkjdk
11.11.1.1111
3.23.AS.AA
24.DD.DD.DDD
24.DD.DD
ab.cd.df.rf
/usr/bin
jhhh 12.12.AF.12



Output is :

Code:
5:24.DD.DD.DDD
9:jhhh 12.12.AF.12


Whereas output should be

Code:
9:jhhh 12.12.AF.12

# 11  
Old 07-26-2010
Code:
grep -ni '[^0-9A-F][0-9A-F]\{1,2\}\.[0-9A-F]\{1,2\}\.[0-9A-F]\{1,2\}\.[0-9A-F]\{1,2\}' infile
9:jhhh 12.12.AF.12

# 12  
Old 07-26-2010
Code:
 
# grep -rn '[0-9A-F][0-9A-F]\.[0-9A-F][0-9A-F]\.[0-9A-F][0-9A-F]\.' ex2.sh
5:24.DD.DD.DD
8:jhhh 12.12.AF.12



---------- Post updated at 05:23 PM ---------- Previous update was at 05:19 PM ----------

Code:
# grep -rn '[0-9a-fA-F][0-9a-fA-F]\.[0-9a-fA-F][0-9a-fA-F]\.[0-9a-fA-F][0-9a-fA-F]\.[0-9a-fA-F][0-9a-fA-F]$' ex2.sh
9:jhhh 12.12.AF.12

if mac address not end of

Code:
# grep -rn '\b[0-9a-fA-F][0-9a-fA-F]\.[0-9a-fA-F][0-9a-fA-F]\.[0-9a-fA-F][0-9a-fA-F]\.[0-9a-fA-F][0-9a-fA-F]\b' ex2.sh
9:jhhh 12.12.AF.12

This User Gave Thanks to ygemici For This Post:
flamingo_l
# 13  
Old 07-26-2010
Thanks a lot ygemici... Smilie


The below code is working for me ....

Code:
grep -rn '\b[0-9a-fA-F][0-9a-fA-F]\.[0-9a-fA-F][0-9a-fA-F]\.[0-9a-fA-F][0-9a-fA-F]\.[0-9a-fA-F][0-9a-fA-F]\b' ex2.sh

But am not understanding why this is not working Smilie

Code:
grep -rn '[0-9a-fA-F][0-9a-fA-F]\.[0-9a-fA-F][0-9a-fA-F]\.[0-9a-fA-F][0-9a-fA-F]\.[0-9a-fA-F][0-9a-fA-F]$' ex2.sh

# 14  
Old 07-26-2010
Quote:
Originally Posted by flamingo_l
Thanks a lot ygemici... Smilie


The below code is working for me ....

Code:
grep -rn '\b[0-9a-fA-F][0-9a-fA-F]\.[0-9a-fA-F][0-9a-fA-F]\.[0-9a-fA-F][0-9a-fA-F]\.[0-9a-fA-F][0-9a-fA-F]\b' ex2.sh

But am not understanding why this is not working Smilie

Code:
grep -rn '[0-9a-fA-F][0-9a-fA-F]\.[0-9a-fA-F][0-9a-fA-F]\.[0-9a-fA-F][0-9a-fA-F]\.[0-9a-fA-F][0-9a-fA-F]$' ex2.sh

Because $ means end of the line

if the line that is

"..... jhhh 12.12.AF.12" --> means "..... jhhh 12.12.AF.12$ "

if the line is

" ..... jhhh 12.12.AF.12 bla blaa... --> means "..... jhhh 12.12.AF.12 bla blaa...$"

and our pattern does not matchs Smilie
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