Confused with grep for multiple words

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LEARN ABOUT CENTOS

virt-login-shell

VIRT-LOGIN-SHELL(1)					      Virtualization Support					       VIRT-LOGIN-SHELL(1)

NAME

       virt-login-shell - tool to execute a shell within a container matching the users name

SYNOPSIS

       virt-login-shell

DESCRIPTION

       The virt-login-shell program is a setuid shell that is used to join an LXC container that matches the user's name.  If the container is not
       running, virt-login-shell will attempt to start the container.  virt-sandbox-shell is not allowed to be run by root.  Normal users will get
       added to a container that matches their username, if it exists, and they are configured in /etc/libvirt/virt-login-shell.conf.

       The basic structure of most virt-login-shell usage is:

	 virt-login-shell

OPTIONS

       -h, --help
	   Display command line help usage then exit.

       -V, --version
	   Display version information then exit.

CONFIG

       By default, virt-login-shell will execute the /bin/sh program for the user.  You can modify this behaviour by defining the shell variable
       in /etc/libvirt/virt-login-shell.conf.

       eg.  shell = [ "/bin/ksh", "--login"]

       By default no users are allowed to use virt-login-shell, if you want to allow certain users to use virt-login-shell, you need to modify the
       allowed_users variable in /etc/libvirt/virt-login-shell.conf.

       eg. allowed_users = [ "tom", "dick", "harry" ]

BUGS

       Report any bugs discovered to the libvirt community via the mailing list "http://libvirt.org/contact.html" or bug tracker
       "http://libvirt.org/bugs.html".	Alternatively report bugs to your software distributor / vendor.

AUTHORS

	 Please refer to the AUTHORS file distributed with libvirt.

	 Daniel Walsh <dwalsh at redhat dot com>

COPYRIGHT

       Copyright (C) 2013 Red Hat, Inc., and the authors listed in the libvirt AUTHORS file.

LICENSE

       virt-login-shell is distributed under the terms of the GNU LGPL v2+.  This is free software; see the source for copying conditions. There
       is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE

SEE ALSO

       virsh(1), <http://www.libvirt.org/>

libvirt-1.1.1							    2014-06-17						       VIRT-LOGIN-SHELL(1)

Shell Programming and Scripting