*****************************Change group .temporary*********.******.************ 教育
# Let's che.ck the descri.ption of newgrp:域名
$ newgrp -h
Usage: .newgrp [-] [group].
$ man. -f newgrp 建材
newgrp (1) - l.og in to a. new group.
newg.rp (1p) - change to a. new group虚拟主机
# From th.e man page,we kno.w this: 电子
newgrp is used to .change the curre.nt group ID during a login session.域名
If the optio.nal - flag is given,the user's environment will be reini.tialized as though the user had logged in (just. li.ke the su -),otherwise the current( 游戏 )
environment, including current working. directory,remains unchan.ged.电脑
# The /e.tc/gshadow stores the password infrom.ation of groups 健康
$ man -f gs.hadow 汽车
gshadow (5) - shado.wed. group file 建材
$ grep lrc /etc/gro.up学习
lrc::500:
[root]# grep l.rc /e.tc/gshadow电影
lrc:::
# grou.p name:encrypted password:.group administrators:group members 建材
$ su - oracle
[.oracle]$ newgrp lrc电脑
Sorry.
# .Because if not ro.ot,the user will be promted for a password if she does not have a password,or if the user is not. listed as a membe.r,the user will be denied.电影
# If w.e use root 健康
[root@server. ~]# id 女人
uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys.),4(adm),6(disk),10(wheel) context=.user_u:syste.m_r:unconfined_t 美容
[.root.@server ~]# newgrp lrc.
[.root@server ~]# id[成人用品]
uid=0(root) gid=500(lrc) groups=0(root),1(bin),2(dae.mon),3(sys),4(ad.m),6(disk),10(wheel),500(lrc) cont.ext=user_u:.system_r:unconfined_t( 游戏 )
# we can find that the root user can change gid success,and the gid has bee.n. changed to .lrc教育
# If w.e want the oracle user to change gid to lrc succe.ss,we c.an use gpasswd by root privilege. 外汇
$ man -f g.passwd 杀毒
gpasswd . (1) - a.dminister the /etc/group file--- 印刷
$ su -
[
root@se.rver. ~]# grep lrc /etc/gshadow学习
lrc:::
[root@server ~]#. gpasswd -a oracle lrc..
Adding u.ser oracle to group .lrc 婚庆
[root@server ~]..# grep lrc /etc/gshadow<性病>
lrc:::oracle
[root@server. ~]# su - ora.cle 外汇
[o.racle@server ~]$ id 汽车
uid=501(oracle.) gid=501(oracle) groups=500(l.rc),5.01(oracle) context=user_u:system_r:unconfined_t 汽车
[
oracle@serv.er ~]$ n.ewgrp lrc 建材
[oracle@server. ~]$ id 电子
uid.=501(oracle) gid=500(lrc.) groups=500(lrc),501(oracle) context=user_u:s.ystem_r:unconfined_t( 游戏 )
# Obviously,We change use gpasswd. -a to add oracl.e to. lrc group as a member.But电影
# there is another way to .grant oracle to use newg.rp 健康
$ su -
[root@server ~]# gpasswd -d ora.cl.e lrc 婚庆
Removing. u.ser oracle from group lrc.
[roo.t@server ~]# grep lrc /etc/.gshadow 女人
lrc:::
[root@server ~]#. g.passwd lrc 建材
Changin.g the password for gr.oup lrc.
New Password:
Re-ent.er new password: .
[root@server ~]# .grep lrc /etc/gsha.dow教育
lr.c:$1$Vqzun/qK$eEjNvYuP7AxNslwN.xo4if.::( 游戏 )
[root@server ~].# su .- oracle 鲜花
[orac.le@server ~]$ id 乙肝
uid=501(oracle) gid=501(oracle) groups=50.1(.oracle) context=user_u:system_r:unc.onfined_t.
[or.acle@server ~]$ newgrp lrc. 杀毒
Password:
[oracle@server ~]$. id学习
ui.d=501(oracle) gi.d=500(lrc) grou.ps=500(lrc),501(oracle) context=user_u:system_r:unconfined_t 鲜花
# We changed the password of group lrc,then input the cor.rect .passwor.d oracle.
# can change the .gid of lr.c..
# If w.e want to delete the password of group,we ca.n use gpasswd -r 女人
[
root@serv.er ~]# grep lrc /etc/gsh.adow( 游戏 )
lrc:$1$Vqzun/qK$.eE.jNvYuP7AxNslwNxo4if.::.
[root@server ~]#. gpass.wd -r lrc.
[.root@.server ~]# grep lrc /etc/gshadow 女人
lrc:::
[ro.ot@server. ~]# su - oracle教育
[orac.le@server ~]$ id.
uid=501(oracle) gid=50.1(oracle) groups=501(oracle) cont.ext=user_u:system_r:unconfined._t.
[oracle@.server ~]$ .newgrp lrc.
Sorry.
# If we want to forbid other non-root user to ch.ange to the specific gi.d..
[root@server. ~]# gpasswd. -R lrc.
[root@server ~]# grep l.rc /etc./gshadow服务器
lrc:!::
[
roo.t@ser.ver ~]# su - oracle 外汇
[o.racle@server ~]$. newgrp lrc<性病>
Password:
Sorry.
#. Previously,we mentioned that If the optional - flag i.s given,the user's .
# environ.ment will be reiniti.alized as though the user had logged in 女人
# (just like the. su -) 外汇
[root@.ser.ver ~]# export T=hh 外汇
[root@server ~]# echo. $T虚拟主机
hh
[
root@s.erv.er ~]# newgrp lrc 建材
[
root@s.erver ~]# echo $T外贸
hh
[root@server ~]#. new.grp - lrc( 游戏 )
[root@server ~]# echo .$T 乙肝
[.root@server ~]# .
因为是在.text mode下总结的，所以使.用蹩脚的英文 杀毒
: )
[ .本帖最后由 ruconse 于 2009.-5-5 23:32 编辑 ]教育
