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Full Discussion: grep option to print the first match of each member of a list?
Top Forums Shell Programming and Scripting grep option to print the first match of each member of a list? Post 302575748 by yifangt on Tuesday 22nd of November 2011 05:28:08 PM
Old 11-22-2011
grep option to print the first match of each member of a list?
Hello,
How to grep only the first match of each (unique) member of a list from the file?
Say member.list contains:
Code:
member1
member2
member3

and table.tab which is sorted by the first 2nd and then 3rd column.
Code:
member1 1.2 234
member1 1.1 234
member2 3.3 111
member2 2.3 222
member2 2.3 111
member3 1.0 123
member3 1.0 134

and output is:
Code:
member1 1.2 234
member2 3.3 111
member3 1.0 123

Option -m or -c seems not what I need. Thanks a lot!

Yifang
 

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LEARN ABOUT HPUX

netgroup

netgroup(4)						     Kernel Interfaces Manual						       netgroup(4)

NAME

       netgroup - list of network groups

DESCRIPTION

       File  defines network-wide groups, and is used for permission checking when executing remote mounts, remote logins, and remote shells.  For
       remote mounts, the information in classifies machines; for remote logins and remote shells, it classifies users.

       Each line of the file defines a group.  The items on a line may be separated by a combination of one or more spaces or tabs.  The line  has
       the format

	      groupname member1 member2 ...

       where memberi is either another group name, or a triple.

       If any of these three fields is left empty, it signifies a wildcard.  Thus

       defines	a group to which everyone belongs.  Field names that begin with something other than a letter, digit or underscore (such as do not
       match any value.  For example, consider the following entries.

       Machine belongs to the group in the domain but no users belong to it.  Similarly, the user belongs to  the  group  in  the  domain  but	no
       machines belong to it.

       Note,  the  domainname field must match the current domain name (as returned by the command), or the entry is not matched.  Also, the user-
       name field is ignored for remote mounts.  Only the hostname and domainname are used.

       The Network Information Service (NIS) can serve network groups.	When it does, the groups are stored in the following NIS maps:

       Refer to ypserv(1M) and ypfiles(4) for an overview of Network Information Service.

AUTHOR

       was developed by Sun Microsystems, Inc.

FILES

SEE ALSO

       makedbm(1M), mountd(1M), ypmake(1M), ypserv(1M), getnetgrent(3C), hosts.equiv(4), ypfiles(4).

       Chapter 7:

																       netgroup(4)
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