RedHat EX200 Dumps

useradd -u 3400 iar

passwd iar

#system-config-date

Note: dialog box will open in that

Check mark Synchronize date and time over network. Remove all the NTP SERVER and click ADD and type

server.domain11.example.com

****************And then press ENTER and the press OK***************

# 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

8 I

82

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)

• fdisk -l
• fdisk -cu /dev/vda

p n

e or p select e

default (first): enter

default (last): enter n

default(first): enter

default(first): +754M t (1-5)

l: 82 p

w #reboot

#mkswap /dev/vda5

• vim /etc/fstab

/dev/vda5 swap swap defaults 0 0

wq

• mount -a
• swapon -a
• swapon -s

# vim /boot/grub/grub.conf

kernel/vmlinuz-2.6.32-71.el6.x86_64 ro root=/dev/mapper/GLSvg-GLSrootrd_LVM_LV=GLSvg/GLSroot

rd_LVM_LV=GLSvg/GLSswaprd_NO_LUKSrd_NO_MDrd_NO_DM

LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us crashkernel=auto rhgb quiet kmcrl=5

Restart to take effect and verification:

# cat /proc/cmdline

ro root=/dev/mapper/GLSvg-GLSroot rd_LVM_LV=GLSvg/GLSroot rd_LVM_LV=GLSvg/GLSswap rd_NO_LUKS rd_NO_MD rd_NO_DM

LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us rhgb quiet kmcrl=5

# cat /etc/grub.conf

# cd /boot

# lftp it

# get dr/dom/kernel-xxxx.rpm

# rpm -ivh kernel-xxxx.rpm

# vim /etc/grub.conf

default=0

# chkconfig autofs on

# cd /etc/

# vim /etc/auto.master

/rhome /etc/auto.ldap

# cp auto.misc auto.ldap

# vim auto.ladp

ldapuser40 -rw,soft,intr 172.24.40.10:/rhome/ldapuser40

* -rw,soft,intr 172.16.40.10:/rhome/&

# service autofs stop

# server autofs start

# showmount -e 172.24.40.10

# su - ladpuser40

• vim /etc/sysctl.conf net.ipv4.ip_forward = 1

• sysctl –w (takes effect immediately)

If no “sysctl.conf” option, use these commands:

• sysctl –a |grep net.ipv4
• sysctl –P net.ipv4.ip_forward = 1
• sysctl -w

# cd /root; wget ftp://192.168.0.254/pub/boot.iso

# mkdir -p /media/cdrom

# vim /etc/fstab

/root/boot.iso /media/cdrom iso9660 defaults,loop 0 0

# mount -a

mount [-t vfstype] [-o options] device dir

*

[root@node2 ~]# lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT

vdb 252:16 0 5G 0 disk

└─vdb1 252:17 0 4.2G 0 part

└─vgrz-lvrz 253:2 0 4.1G 0 lvm /datarz

vdc 252:32 0 5G 0 disk

vdd 252:48 0 5G 0 disk

vde 252:64 0 10G 0 disk

[root@node2 ~]# parted /dev/vdc mklabel msdos

[root@node2 ~]# parted /dev/vdc mkpart primary 1MiB 4200MiB

[root@node2 ~]# parted /dev/vdc set 1 lvm on

*

[root@node2 ~]# udevadm settle

[root@node2 ~]# pvcreate /dev/vdc1

Physical volume "/dev/vdc1" successfully created.

[root@node2 ~]# vgcreate -s 16M datavg /dev/vdc1

Volume group "datavg" successfully created

[root@node2 ~]# lvcreate -n datalv -L 4000M datavg

Logical volume "datalv" created.

[root@node2 ~]# mkfs.xfs /dev/datavg/datalv

[root@node2 ~]# mkdir /data

[root@node2 ~]# blkid

/dev/mapper/datavg-datalv: UUID="7397a292-d67d-4632-941e-382e2bd922ce" BLOCK_SIZE="512" TYPE="xfs"

*

[root@node2 ~]# vim /etc/fstab

UUID=7397a292-d67d-4632-941e-382e2bd922ce /data xfs defaults 0 0

[root@node2 ~]# mount UUID=7397a292-d67d-4632-941e-382e2bd922ce /data

[root@node2 ~]# reboot

[root@node2 ~]# df -hT

Filesystem Type Size Used Avail Use% Mounted on

/dev/mapper/datavg-datalv xfs 3.9G 61M 3.9G 2% /data

*

1. Reboot the server pressing by Ctrl+Alt+Del

2. When the boot-loader menu appears, press the cursor keys to highlight the default boot-loader entry

3. Press e to edit the current entry.

4. Use the cursor keys to navigate to the line that starts with linux.

5. Press End to move the cursor to the end of the line.

6. Append rd.break to the end of the line.

7. Press Ctrl+x to boot using the modified configuration.

8. At the switch_root prompt

*

switch_root:/# mount -o remount,rw /sysroot

switch_root:/# chroot /sysroot

sh-4.4# echo kexdrams | passwd --stdin root

Changing password for user root.

passwd: all authentication tokens updated successfully.

sh-4.4# touch /.autorelabel

sh-4.4# exit; exit

*

Type exit twice to continue booting your system as usual.

grep seismic /usr/share/dict/words> /root/wordlist

[root@node2 ~]# tuned-adm list

[root@node2 ~]# tuned-adm active

Current active profile: virtual-guest

[root@node2 ~]# tuned-adm recommend

virtual-guest

[root@node2 ~]# tuned-adm profile virtual-guest

[root@node2 ~]# tuned-adm active

Current active profile: virtual-guest

[root@node2 ~]# reboot

[root@node2 ~]# tuned-adm active

Current active profile: virtual-guest

By default, system accept the logs only generated from local host. To accept the Log from other host configure:

vi /etc/sysconfig/syslog SYSLOGD_OPTIONS="-m 0 -r"

Where

-m 0 disables 'MARK' messages.

-r enables logging from remote machines

-x disables DNS lookups on messages received with -r

service syslog restart

• Verify the File whether Shared or not ? : cat /etc/exports
• Start the nfs service: service nfs start
• Start the portmap service: service portmap start
• Make automatically start the nfs service on next reboot: chkconfig nfs on
• Make automatically start the portmap service on next reboot: chkconfig portmap on
• Verify either sharing or not: showmount -e localhost
• Check that default firewall is running on system?

If running flush the iptables using iptables -F and stop the iptables service.

# useradd -u 1234 alex

# passwd alex

alex111

alex111

OR

echo alex111|passwd -stdin alex

• rpm -ivh ftp://server1/example.com/pub/updates/zsh-*

or

• Login to ftp server : ftp ftp://server1.example.com using anonymous user.
• Change the directory: cd pub and cd updates
• Download the package: mget zsh-*
• Quit from the ftp prompt : bye
• Install the package
• rpm -ivh zsh-*
• Verify either package is installed or not : rpm -q zsh

crontab -u mary -e

23 14 * * * echo "Hello World."

• vi /etc/sysconfing/network NETWORKING=yes HOSTNAME=station?.example.com GATEWAY=192.168.0.254

service network restart

2.vi /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0

ONBOOT=yes

BOOTPROTO=static

IPADDR=X.X.X.X

NETMASK=X.X.X.X

GATEWAY=192.168.0.254

ifdown eth0

ifup eth0