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RHCE FINAL Questions and Answers
- 12.
[root@krishna ~]# service nfslock restart
Stopping NFS locking: [ OK ]
Stopping NFS statd: [ OK ]
Starting NFS statd: [ OK ]
Client side
[root@vrndavan ~]# mkdir /var/ftp
[root@vrndavan ~]# mount t nfs 192.168.1.71:/common/ /var/nfs/
[root@vrndavan ~]# mount
/dev/mapper/vg_vrndavanlv_root on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw)
/dev/sda1 on /boot type ext4 (rw)
/dev/mapper/vg_vrndavanlv_home on /home type ext4 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
nfsd on /proc/fs/nfsd type nfsd (rw)
192.168.1.71:/common/ on /var/nfs type nfs
(rw,vers=4,addr=192.168.1.71,clientaddr=192.168.1.70)
[root@vrndavan ~]# vi /etc/fstab
[root@vrndavan nfs]# cat /etc/fstab
#
# /etc/fstab
# Created by anaconda on Wed Aug 14 22:46:20 2013
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/vg_vrndavanlv_root / ext4 defaults 1 1
UUID=638d1e1acc4c402da3dc7fbee2ecafe9 /boot ext4 defaults 1 2
/dev/mapper/vg_vrndavanlv_home /home ext4 defaults 1 2
/dev/mapper/vg_vrndavanlv_swap swap swap defaults 0 0
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
- 13. sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
192.168.1.71:/common /var/nfs/ nfs rw,sync,hard,intr 0 0
Note:Because you will not have root access you will not be able directly mount your
exported
/common directory on your virtual system,however autofs is running on your physical
[root@vrndavan ~]# mount
/dev/mapper/vg_vrndavanlv_root on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw)
/dev/sda1 on /boot type ext4 (rw)
/dev/mapper/vg_vrndavanlv_home on /home type ext4 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
nfsd on /proc/fs/nfsd type nfsd (rw)
192.168.1.71:/common/ on /var/nfs type nfs
(rw,vers=4,addr=192.168.1.71,clientaddr=192.168.1.70)
[root@vrndavan ~]# df h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_vrndavanlv_root
50G 35G 13G 75% /
tmpfs 1.9G 900K 1.9G 1% /dev/shm
/dev/sda1 485M 93M 368M 21% /boot
/dev/mapper/vg_vrndavanlv_home
176G 6.8G 161G 5% /home
192.168.1.71:/common/
50G 9.5G 38G 21% /var/nfs
9 .SAMBA
– Your SMB server must be a member of the SMBGROUP workgroup
– The share’s name must be common
– The common share must be available to example.com domain clients only
– The common share must be browseable
– GNANA must have read access to the share, authenticating with the same
password
![RHCE Questions
You will note that some requirements specify that a service should not be available from the DNS
domain cracker.org. All systems in that domain are in the
172.24.0.0/255.255.0.0 subnet, and all systems in that subnet are in cracker.org.
1. Create a repositary for
http://station.domain254.example.com/pub/rhel6/dvd
Ans:
[root@krishna ~]# vi /etc/yum.repo.d/sample.repo
[rhec]
baseurl=http://station.domainx.example.com/pub/rhel6/dvd
gpgckeck=0
save& quit
[root@krishna ~]# yum clean all
[root@krishna ~]# yum list all
2. Configure SELINUX
The machine should be running in enforcing mode
[root@krishna ~]# vi /etc/selinux/config
[root@krishna ~]# cat /etc/selinux/config
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing SELinux security policy is enforced.
# permissive SELinux prints warnings instead of enforcing.
# disabled No SELinux policy is loaded.
SELINUX=enforcing
# SELINUXTYPE= can take one of these two values:
# targeted Targeted processes are protected,
# mls Multi Level Security protection.
SELINUXTYPE=targeted](https://image.slidesharecdn.com/rhcsafinal-131112062655-phpapp02/85/RHCE-FINAL-Questions-and-Answers-1-320.jpg)
![3. Cronfigure Cron deny
[root@krishna ~]# yum install cron* y
Loaded plugins: fastestmirror, refreshpackagekit, security
Loading mirror speeds from cached hostfile
* base: centosmirror.go4hosting.in
* extras: mirrors.digipower.vn
* updates: centosmirror.go4hosting.in
Setting up Install Process
Package crontabs1.1033.el6.noarch already installed and latest version
Package cronieanacron1.4.47.el6.x86_64 already installed and latest version
Package cronie1.4.47.el6.x86_64 already installed and latest version
Resolving Dependencies
Transaction Test Succeeded
Running Transaction
Installing : cronienoanacron1.4.47.el6.x86_64 1/1
Verifying : cronienoanacron1.4.47.el6.x86_64 1/1
Installed:
cronienoanacron.x86_64 0:1.4.47.el6
Complete!
[root@krishna ~]# vi /etc/cron.deny
[root@krishna ~]# cat /etc/cron.deny
Lason
root@krishna ~]# chkconfig crond on
[root@krishna ~]# service crond restart
Stopping crond: [ OK ]
Starting crond: [ OK ]
Configure a cron access Lason should not be allowed to use cron
Note:This restriction must not affect any other user](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)