RedHat EX200 - Red Hat Certified System Administrator - RHCSA (8.2)

/etc/init.d/rpcbind start

/etc/init.d/nfslock start

/etc/init.d/nfs start

chkconfig rpcbind on

chkconfig nfslock on

chkconfig nfs on

showmount -e localhost

1. Use fdisk /dev/hda to create new partition.

2. Type n For New partitions.

3. It will ask for Logical or Primary Partitions. Press l for logical.

4. It will ask for the Starting Cylinder: Use the Default by pressing Enter

Key.

5. Type the Size: +100M you can specify either Last cylinder of size here.

6. Press P to verify the partitions lists and remember the partitions name.

7. Press w to write on partitions table.

8. Either Reboot or use partprobe command.

9. Use mkfs -t ext3 /dev/hda?

OR

mke2fs -j /dev/hda? To create ext3 filesystem.

vi /etc/fstab

Write:

/dev/hda? /data ext3 defaults 1 2

Verify by mounting on current Sessions also: mount /dev/hda? /data

getenforce // Check the current mode of SELinux // SELinux runs in enforcing mode // Check

getenforce 1

getenforce

vim /etc/selinux/config selinux=enforcing // To temporarily enable SELinux

wg

sestatus

mkdir/root/findfiles

find / -user jack -exec cp -a {} /root/findfiles/ \; ls /root/findresults

# pvcreate /dev/sda7 /dev/sda8

# vgcreate -s 16M vg1 /dev/sda7 /dev/sda8

# lvcreate -l 50 -n lvm02

# mkfs.ext4 /dev/vg1/lvm02

# blkid /dev/vg1/lv1

# vim /etc/fstab

# mkdir -p /mnt/data

UUID=xxxxxxxx /mnt/data ext4 defaults 0 0

# vim /etc/fstab

# mount -a

# mount

(Verify)

First check the size of Logical Volume: lvdisplay /dev/vo/myvol

Make sure that the filesystem is in a consistent state before reducing:

# fsck -f /dev/vo/myvol

Now reduce the filesystem by 200MB.

# resize2fs /dev/vo/myvol 200M

It is now possible to reduce the logical volume. #lvreduce /dev/vo/myvol -L 200M

Verify the Size of Logical Volume: lvdisplay /dev/vo/myvol

Verify that the size comes in online or not: df -h

*

[root@node1 ~]# useradd -u 3945 fred

[root@node1 ~]# echo "iamredhatman" | passwd --stdin fred

Changing password for user fred.

passwd: all authentication tokens updated successfully

# fdisk /dev/sda

p

(check Partition table)

n

(create new partition: press e to create extended partition, press p to create the main partition, and the extended partition is further divided into logical partitions) Enter

+2G

t

l

W

partx -a /dev/sda

partprobe

mkswap /dev/sda8

Copy UUID

swapon -a

vim /etc/fstab

UUID=XXXXX swap swap defaults 0 0

(swapon -s)

Download the new kernel file and then install it.

[root@desktop8 Desktop]# ls

kernel-2.6.32-71.7.1.el6.x86_64.rpm

kernel-firmware-2.6.32-71.7.1.el6.noarch.rpm

[root@desktop8 Desktop]# rpm -ivh kernel-*

Preparing... ###########################################

[100%]

1:kernel-firmware

########################################### [ 50%]

2:kernel

########################################### [100%]

Verify the grub.conf file, whether use the new kernel as the default boot. [root@desktop8 Desktop]# cat /boot/grub/grub.conf default=0

title Red Hat Enterprise Linux Server (2.6.32-71.7.1.el6.x86_64)

root (hd0,0)

kernel /vmlinuz-2.6.32-71.7.1.el6.x86_64 ro root=/dev/mapper/vol0-root rd_LVM_LV=vol0/root rd_NO_LUKS rd_NO_MD

rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us crashkernel=auto rhgb quiet

initrd /initramfs-2.6.32-71.7.1.el6.x86_64.img

nameserver is specified in question,

1. Vi /etc/resolv.conf

nameserver 192.168.0.254

2. host server1.example.com