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Full Discussion: "group by" using shell script?
Top Forums Shell Programming and Scripting "group by" using shell script? Post 302421948 by tiger2000 on Monday 17th of May 2010 06:34:04 AM
Old 05-17-2010
"group by" using shell script?
not sure if it's called "group by" , but what i'm going to do is like this:

i have a file below:

Code:
192.168.1.10
192.168.1.10
192.168.1.10
192.168.1.11
192.168.1.15
192.168.1.15
192.168.1.20
192.168.1.22

then i hope to get the result like this:

Code:
192.168.1.10 : 3
192.168.1.11 : 1
192.168.1.15 : 2
192.168.1.20 : 1
192.168.1.22 : 1

the number in second column is how many times it appears in the file.

1. use sort , and uniq to get how many unique record in this file
2. use grep with wc -l command to get how many times it appears

is there any better to do so ?? any advice?

Thanks.
Last edited by radoulov; 05-17-2010 at 08:12 AM.. Reason: Please use code tags!
 

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LEARN ABOUT SUSE

sg

newgrp(1)						      General Commands Manual							 newgrp(1)

NAME

       newgrp -  change effective group ID sg - execute command with different group ID

SYNOPSIS

       newgrp [-l] [group]
       sg group -c command

DESCRIPTION

       The  newgrp  command changes the user's real and effetive group ID by replacing the current shell with a new shell. A new shell is launched
       even if an error occours.

       A password is requested if the group has a password and the user is not listed in the group file as being a member of that group. The pass-
       word can be changed with the gpasswd(1) command.

       If the new effective group ID is not in the supplementary group list, newgrp will add the new group ID to the supplementary list, too.

       With  no  operands  and options, newgrp changes the user's group IDs (real and effective) back to the group specified in password and group
       file.

       The sg command works like the newgrp command, except that it executes the given command with /bin/sh and upon exit the group ID of the cur-
       rent shell is not changed.

OPTIONS

       -l, --login
	      reinitialize the environment as if the user logged in.

       --help Print a help list.

       -u, --usage
	      Print a short usage message.

       -v, --version
	      Print program version.

SEE ALSO

       gpasswd(1), group(5), passwd(1), passwd(5), su(1)

AUTHOR

       Thorsten Kukuk <kukuk@suse.de>

pwdutils							    April 2004								 newgrp(1)
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