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Top Forums Shell Programming and Scripting Need help in Regular expression in bash shell Post 302440147 by flamingo_l on Monday 26th of July 2010 09:49:51 AM
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
 

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shells(4)							   File Formats 							 shells(4)

NAME
shells - shell database SYNOPSIS
/etc/shells DESCRIPTION
The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser- shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root. A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by the routines which search the file. Blank lines are also ignored. The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/pfcsh, /bin/pfksh, /bin/pfsh, /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/pfcsh, /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh. Note that /etc/shells overrides the default list. Invalid shells in /etc/shells may cause unexpected behavior (such as being unable to log in by way of ftp(1)). FILES
/etc/shells lists shells on system SEE ALSO
vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4) SunOS 5.10 4 Jun 2001 shells(4)
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