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Full Discussion: how to deleting except the patern in a file
Top Forums UNIX for Dummies Questions & Answers how to deleting except the patern in a file Post 302357976 by Tytalus on Thursday 1st of October 2009 05:12:15 AM
Old 10-01-2009
one way:

Code:
#  cat infile
quality hardware csx pfizet honda kiuty
hardware quality pfizer name
newyork quality mafoi pfizer  working csx

#  nawk '{t=$1" "$2;for (i=3;i<=NF;i++){ if (index("csx pfizer mafoi",$i)){t=t" "$i}} print t;t=""}' infile
quality hardware csx
hardware quality pfizer
newyork quality mafoi pfizer csx

(Not quite the same as your output as it removes the "pfizet" on line 1, which I'm guessing was a minro typo ?)

HTH
Last edited by Tytalus; 10-01-2009 at 06:17 AM.. Reason: minor typo
 

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LEARN ABOUT MINIX

gshadow

GSHADOW(5)                                                 File Formats and Conversions                                                 GSHADOW(5)

NAME

       gshadow - shadowed group file

DESCRIPTION

       /etc/gshadow contains the shadowed information for group accounts.

       This file must not be readable by regular users if password security is to be maintained.

       Each line of this file contains the following colon-separated fields:

       group name
           It must be a valid group name, which exist on the system.

       encrypted password
           Refer to crypt(3) for details on how this string is interpreted.

           If the password field contains some string that is not a valid result of crypt(3), for instance ! or *, users will not be able to use a
           unix password to access the group (but group members do not need the password).

           The password is used when a user who is not a member of the group wants to gain the permissions of this group (see newgrp(1)).

           This field may be empty, in which case only the group members can gain the group permissions.

           A password field which starts with an exclamation mark means that the password is locked. The remaining characters on the line
           represent the password field before the password was locked.

           This password supersedes any password specified in /etc/group.

       administrators
           It must be a comma-separated list of user names.

           Administrators can change the password or the members of the group.

           Administrators also have the same permissions as the members (see below).

       members
           It must be a comma-separated list of user names.

           Members can access the group without being prompted for a password.

           You should use the same list of users as in /etc/group.

FILES

       /etc/group
           Group account information.

       /etc/gshadow
           Secure group account information.

SEE ALSO

       gpasswd(5), group(5), grpck(8), grpconv(8), newgrp(1).

shadow-utils 4.5                                                    01/25/2018                                                          GSHADOW(5)
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