DHCP Server RHEL7

DHCP Server :: Dynamic Host Control protocol

Port Number 67
Package: dhcp*
service : dhcpd.service
config file: /etc/dhcp/dhcpd.conf

[root@server7 ~]# yum install dhcp*
Loaded plugins: langpacks
Package 12:dhcp-common-4.2.5-27.el7.x86_64 already installed and latest version
Package 12:dhcp-libs-4.2.5-27.el7.x86_64 already installed and latest version
Resolving Dependencies
--> Running transaction check
---> Package dhcp.x86_64 12:4.2.5-27.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

==============================================================================================================================================================
 Package                          Arch                               Version                                       Repository                            Size
==============================================================================================================================================================
Installing:
 dhcp                             x86_64                             12:4.2.5-27.el7                               rhel_dvd                             506 k

Transaction Summary
==============================================================================================================================================================
Install  1 Package

Total download size: 506 k
Installed size: 1.4 M
Is this ok [y/d/N]: y
Downloading packages:
dhcp-4.2.5-27.el7.x86_64.rpm                                                                                                           | 506 kB  00:00:00    
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : 12:dhcp-4.2.5-27.el7.x86_64                                                                                                                1/1
  Verifying  : 12:dhcp-4.2.5-27.el7.x86_64                                                                                                                1/1

Installed:
  dhcp.x86_64 12:4.2.5-27.el7                                                                                                                                

Complete!
[root@server7 ~]# systemctl enable dhcpd.service
ln -s '/usr/lib/systemd/system/dhcpd.service' '/etc/systemd/system/multi-user.target.wants/dhcpd.service'
[root@server7 ~]# systemctl start dhcpd.service
[root@server7 ~]# firewall-cmd --permanent --add-service=dhcp
success
[root@server7 ~]# firewall-cmd --reload
success
[root@server7 ~]# cp /usr/share/doc/dhcp-4.2.5/dhcpd.conf.example /etc/dhcp/dhcpd.conf
cp: overwrite ‘/etc/dhcp/dhcpd.conf’? y
[root@server7 ~]# vim /etc/dhcp/dhcpd.conf

## Default Line Number 48 ###
# A slightly different configuration for an internal subnet.
subnet 172.25.7.0 netmask 255.255.255.0 {
  range 172.25.7.20 172.25.7.22;
  option domain-name-servers ns1.internal.example.org;
  option domain-name "example.com";
  option routers 172.25.7.2;
  option broadcast-address 172.25.7.255;
  default-lease-time 600;
  max-lease-time 7200;
}

:wq! (Save & Exit)

#systemctl restart dhcpd.service

providing remote block storage - RHEL 7 / Centos 7

iSCSI, which stands for Internet Small Computer System Interface, works on top of the Transport Control Protocol (TCP) and allows the SCSI command to be sent end-to-end over local-area networks (LANs), wide-area networks (WANs) or the Internet.

• Create one LVM
• Convert that LVM into LUN using iSCSI Software
• Map Converted LUN to initiator and use it as a local HDD to initiator

Creating LVM

[root@server4 ~]# fdisk /dev/vdb
Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0xab08db42.

Command (m for help): n
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p): Hit Enter
Using default response p
Partition number (1-4, default 1): Hit Enter 
First sector (2048-20971519, default 2048):Hit Enter
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-20971519, default 20971519): +5G
Partition 1 of type Linux and of size 5 GiB is set

Command (m for help): wq
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
[root@server4 ~]# partprobe /dev/vdb





[root@server4 ~]# pvcreate /dev/vdb1
  Physical volume "/dev/vdb1" successfully created
[root@server4 ~]# vgcreate vgiscsi /dev/vdb1
  Volume group "vgiscsi" successfully created
[root@server4 ~]# lvcreate -l 100%FREE -n lviscsi vgiscsi
  Logical volume "lviscsi" created

[root@server4 ~]# lvs
  LV      VG      Attr       LSize Pool Origin Data%  Move Log Cpy%Sync Convert
  lviscsi vgiscsi -wi-a----- 5.00g             

[root@server4 ~]# yum install targetcli*



[root@server4 ~]# targetcli
Warning: Could not load preferences file /root/.targetcli/prefs.bin.
targetcli shell version 2.1.fb34
Copyright 2011-2013 by Datera, Inc and others.
For help on commands, type 'help'.

/> ls
o- / ......................................................................................................................... [...]
  o- backstores ........................................ [...]
  | o- block ........................... [Storage Objects: 0]
  | o- fileio ............................... [Storage Objects: 0]
  | o- pscsi ............................... [Storage Objects: 0]
  | o- ramdisk ............................ [Storage Objects: 0]
  o- iscsi ........................................ [Targets: 0]
  o- loopback ..................................... [Targets: 0]
/> /backstores/block create iscsilun /dev/vgiscsi/lviscsi
Created block storage object iscsilun using /dev/vgiscsi/lviscsi.
/> ls
o- / ...................................................... [...]
  o- backstores ........................................... [...]
  | o- block ............................... [Storage Objects: 1]
  | | o- iscsilun ...[/dev/vgiscsi/lviscsi (5.0GiB) write-thru deactivated]
  | o- fileio ................................. [Storage Objects: 0]
  | o- pscsi ............................... [Storage Objects: 0]
  | o- ramdisk ............................ [Storage Objects: 0]
  o- iscsi ........................................ [Targets: 0]
  o- loopback ..................................... [Targets: 0]
/> /iscsi create iqn.2017-03.com.arkit:server4
Created target iqn.2017-03.com.arkit:server4.
Created TPG 1.
/> ls
o- / ..................................................... [...]
  o- backstores .......................................... [...]
  | o- block .............................. [Storage Objects: 1]
  | | o- iscsilun .......... [/dev/vgiscsi/lviscsi (5.0GiB) write-thru deactivated]
  | o- fileio ............................. [Storage Objects: 0]
  | o- pscsi .............................. [Storage Objects: 0]
  | o- ramdisk ............................ [Storage Objects: 0]
  o- iscsi ........................................ [Targets: 1]
  | o- iqn.2017-03.com.arkit:server4 ................. [TPGs: 1]
  |   o- tpg1 ........................... [no-gen-acls, no-auth]
  |     o- acls ...................................... [ACLs: 0]
  |     o- luns ...................................... [LUNs: 0]
  |     o- portals ................................ [Portals: 0]
  o- loopback ...................................... [Targets: 0]

GO TO Client side and collect the iqn number

[root@desktop4 ~]# yum install iscsi*
Loaded plugins: langpacks
rhel_dvd                                                                                                                       | 4.1 kB  00:00:00    
(1/2): rhel_dvd/group_gz                                                                                                       | 134 kB  00:00:00    
(2/2): rhel_dvd/primary_db                                                                                                     | 3.4 MB  00:00:00    
Package iscsi-initiator-utils-6.2.0.873-21.el7.x86_64 already installed and latest version
Package iscsi-initiator-utils-iscsiuio-6.2.0.873-21.el7.x86_64 already installed and latest version
Nothing to do

[root@desktop4 ~]# cat /etc/iscsi/initiatorname.iscsi
InitiatorName=iqn.1994-05.com.redhat:9e96ff23da37
[root@desktop4 ~]# systemctl enable iscsid.service
ln -s '/usr/lib/systemd/system/iscsid.service' '/etc/systemd/system/multi-user.target.wants/iscsid.service'
[root@desktop4 ~]# systemctl start iscsid.service

Come Back to the Server and Map LUN to Initiator

/> /iscsi/iqn.2017-03.com.arkit:server4/tpg1/acls create iqn.1994-05.com.redhat:9e96ff23da37
Created Node ACL for iqn.1994-05.com.redhat:9e96ff23da37
/> iscsi/iqn.2017-03.com.arkit:server4/tpg1/luns create /backstores/block/iscsilun
Created LUN 0.
Created LUN 0->0 mapping in node ACL iqn.1994-05.com.redhat:9e96ff23da37
/> /iscsi/iqn.2017-03.com.arkit:server4/tpg1/portals create 172.25.4.11
Using default IP port 3260
Created network portal 172.25.4.11:3260.
/> saveconfig
Last 10 configs saved in /etc/target/backup.
Configuration saved to /etc/target/saveconfig.json

Press CTRL + D

[root@server4 ~]# firewall-cmd --permanent --add-port=3260/tcp
success
[root@server4 ~]# firewall-cmd --reload
success

Go To Client and Connect the Mapped LUN

[root@desktop4 ~]# iscsiadm -m discovery -t st -p 172.25.4.11
172.25.4.11:3260,1 iqn.2017-03.com.arkit:server4
[root@desktop4 ~]# iscsiadm -m node -T iqn.2017-03.com.arkit:server4 -p 172.25.4.11 -l
Logging in to [iface: default, target: iqn.2017-03.com.arkit:server4, portal: 172.25.4.11,3260] (multiple)
Login to [iface: default, target: iqn.2017-03.com.arkit:server4, portal: 172.25.4.11,3260] successful.

[root@desktop4 ~]# fdisk -l /dev/sda

Disk /dev/sda: 5364 MB, 5364514816 bytes, 10477568 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 4194304 bytes

[root@desktop4 ~]# fdisk /dev/sda
Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x2e115ccc.

Command (m for help): n
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p):
Using default response p
Partition number (1-4, default 1):
First sector (8192-10477567, default 8192):
Using default value 8192
Last sector, +sectors or +size{K,M,G} (8192-10477567, default 10477567):
Using default value 10477567
Partition 1 of type Linux and of size 5 GiB is set

Command (m for help): p

Disk /dev/sda: 5364 MB, 5364514816 bytes, 10477568 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 4194304 bytes
Disk label type: dos
Disk identifier: 0x2e115ccc

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1            8192    10477567     5234688   83  Linux

Command (m for help): t
Selected partition 1
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'

Command (m for help): wq
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
[root@desktop4 ~]# partprobe /dev/sda
[root@desktop4 ~]# mkfs.ext4 /dev/sda1
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=1024 blocks
327680 inodes, 1308672 blocks
65433 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=1340080128
40 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
    32768, 98304, 163840, 229376, 294912, 819200, 884736

Allocating group tables: done                           
Writing inode tables: done                           
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

[root@desktop4 ~]# mkdir /ravi


[root@desktop4 ~]# vim /etc/fstab
[root@desktop4 ~]# cat /etc/fstab |grep sda
/dev/sda1    /ravi    ext4    _netdev    0 0
[root@desktop4 ~]# mount -a
[root@desktop4 ~]# df -h |grep ravi
/dev/sda1       4.8G   20M  4.6G   1% /ravi

Enjoy................

Searching file content in Linux/Unix

1. Check Grep version
grep -V

2. Search single word in single file / multifles
grep <string> *

3. Search Multiple words in single file / multiple files
grep -E 'word1|word2'

4. Seach text which is not maching to string
grep -v "String" fileName

5. Print the matching string and its before lines
grep ens33 -A 4

6. Print the matching string and its after lines and its around lines
grep enss33 -B 4
grep ens33 -C 4

7. Search a string Recursively
grep -r <string> <fileName>

8. Grep the string with highlighted in color
grep --color=auto <string> <file Name>
export GREP_COLOR='1;30;43'

9. display the lines which does not matches all the given strings
grep -v -e "a" -e "b" -e "c" filename.txt

10. Get the count of given string from file
grep -c <string> filename

11. Search for files which are matching to the given string
grep -l this demo*

12. Beginning of line (^) using cap symble
grep "^Nov 10" messages.1

13. End of the line ( $) using dollar symble
grep "terminating.$" messages



? The preceding item is optional and matched at most once.
* The preceding item will be matched zero or more times.
+ The preceding item will be matched one or more times.
{n} The preceding item is matched exactly n times.
{n,} The preceding item is matched n or more times.
{,m} The preceding item is matched at most m times.
{n,m} The preceding item is matched at least n times, but not more than m times.

Few examples about grep command..

Comment one grep command below in comment section....

Managing Files and Directories - Linux

                In Linux all are files only. Based on the type we identify the files. In this article we are going to see how to create, list, copy, move and delete the files and directories. 

1. Creating files and Directories
2. Listing Files and Directories
3. Copying Files and Directories
4. Moving files and directories
5. Deleting Files and Directories

Create empty files 

To create an empty files, we have to use touch command

                           touch is a standard Unix command-line interface program which is used to update the access date and / or modification date of a file or directory. In its default usage, it is the equivalent of creating or opening a file and saving it without any change to the file contents. Touch eliminates the unnecessary steps of opening the file, saving the file, and closing the file again. Instead it simply updates the dates associated with the file or directory. An updated access or modification date can be important for a variety of other programs such as backup utilities or the make command-line interface programming utility. Typically these types of programs are only concerned with files which have been created or modified after the program was last run.

[root@server1 touch]# touch file

[root@server1 touch]# ls -l

total 0

-rw-r--r--. 1 root root 0 Mar 13 07:01 file

[root@server1 touch]# touch file1 file2 file3 file4

[root@server1 touch]# ls -l

total 0

-rw-r--r--. 1 root root 0 Mar 13 07:08 file1

-rw-r--r--. 1 root root 0 Mar 13 07:08 file2

-rw-r--r--. 1 root root 0 Mar 13 07:08 file3

-rw-r--r--. 1 root root 0 Mar 13 07:08 file4

[root@server1 touch]# touch ravi{1..10}.txt

[root@server1 touch]# ls -l

total 0

-rw-r--r--. 1 root root 0 Mar 13 07:09 ravi10.txt

-rw-r--r--. 1 root root 0 Mar 13 07:09 ravi1.txt

-rw-r--r--. 1 root root 0 Mar 13 07:09 ravi2.txt

-rw-r--r--. 1 root root 0 Mar 13 07:09 ravi3.txt

-rw-r--r--. 1 root root 0 Mar 13 07:09 ravi4.txt

-rw-r--r--. 1 root root 0 Mar 13 07:09 ravi5.txt

-rw-r--r--. 1 root root 0 Mar 13 07:09 ravi6.txt

-rw-r--r--. 1 root root 0 Mar 13 07:09 ravi7.txt

-rw-r--r--. 1 root root 0 Mar 13 07:09 ravi8.txt

-rw-r--r--. 1 root root 0 Mar 13 07:09 ravi9.txt

Create file using cat command

                          The program cat is a standard Unix utility that reads files sequentially, writing them to standard output. The name is derived from its function to catenate/concatenate and list files.

[root@server1 cat]# cat > filebycat
This file is created by cat command
[root@server1 cat]# cat filebycat
This file is created by cat command

Creating Directories

mkdir (make directory) command in the Unix, DOS and OS/2 and MS windows and other programs is used to make a new directory.

[root@server1 mkdir]# mkdir testdir
[root@server1 mkdir]# mkdir dirtest dir1
[root@server1 mkdir]# ls -l
total 0
drwxr-xr-x. 2 root root 6 Mar 13 07:16 dir1
drwxr-xr-x. 2 root root 6 Mar 13 07:16 dirtest
drwxr-xr-x. 2 root root 6 Mar 13 07:16 testdir

Listing files and directories

                        To list the files and directories we have to use 'ls' command. 'ls' command will list files and directories current directory, by providing the remote directory path will list all files and directories on that remote directory.

ls command with 25 practical examples

ls <Path>

[root@server1 mkdir]# ls
dir1  dirtest  testdir
[root@server1 mkdir]# ls -ltr
total 0
drwxr-xr-x. 2 root root 6 Mar 13 07:16 testdir
drwxr-xr-x. 2 root root 6 Mar 13 07:16 dirtest
drwxr-xr-x. 2 root root 6 Mar 13 07:16 dir1
[root@server1 mkdir]# ls -k
dir1  dirtest  testdir

Copy files and directories

                         cp is a UNIX command for copying files and directories. The command has three principal modes of operation, expressed by the types of arguments presented to the program for copying a file to another file, one or more files to a directory, or for copying entire directories to another directory.

we have to use -r option along with cp command to copy the directories.

cp <SourcePath> <DestinationPath>

[root@server1 ~]# cp file1 dir1/
[root@server1 ~]# cp testdir dir1/
cp: omitting directory ‘testdir’
[root@server1 ~]# cp -r testdir dir1/

Moving files and directories

                   mv (short for move) is a Unix command that moves one or more files or directories from one place to another. If both filenames are on the same filesystem, this results in a simple file rename; otherwise the file content is copied to the new location and the old file is removed. Using mv requires the user to have write permission for the directories the file will move between. This is because mv changes the content of both directories (i.e., the source and the target) involved in the move. When using the mv command on files located on the same filesystem, the file's timestamp is not updated.

mv <SourcePath> <DestinatioPath>

[root@server1 ~]# mv file3.txt /tmp/
mv: overwrite ‘/tmp/file3.txt’? y

[root@server1 ~]# mv dir1/ /tmp/
mv: overwrite ‘/tmp/dir1’? y
mv: cannot move ‘dir1/’ to ‘/tmp/dir1’: File exists

Deleting Files and Directories

               rm (short for remove) is a basic UNIX command used to remove objects such as files, directories, device nodes, symbolic links, and so on from the filesystem. To be more precise, rm removes references to objects from the filesystem, where those objects might have had multiple references (for example, a file with two different names), and the objects themselves are discarded only when all references have been removed and no programs still have open handles to the objects.

[root@server1 ~]# ls
anaconda-ks.cfg  file1       file5.txt  file8.txt             mkdir  tech1  testdir   touch
cat              file10.txt  file6.txt  file9.txt             pipe   tech2  testdir1
dir1             file4.txt   file7.txt  initial-setup-ks.cfg  Pipe   tech3  testdir2

[root@server1 ~]# rm -rf file*

[root@server1 ~]# ls
anaconda-ks.cfg  dir1                  mkdir  Pipe   tech2  testdir   testdir2
cat              initial-setup-ks.cfg  pipe   tech1  tech3  testdir1  touch

We have a different file types in Linux we will discuss about few file types:

1. Regular Files (-)

we can create files using #touch command

[root@server1 ~]# ls -l |grep ^-
-rw-------. 1 root root 1292 Jan 19 23:14 anaconda-ks.cfg
-rw-r--r--. 1 root root 1343 Jan 19 23:15 initial-setup-ks.cfg
-rw-r--r--. 1 root root   31 Mar 13 04:54 Pipe

2. Directory Files (d)

Directories will start with d character we can search the directories using below command

[root@server1 ~]# ls -l /* |grep ^d
drwxr-xr-x. 2 root root       26 Jan 19 23:08 grub
drwxr-xr-x. 6 root root      104 Jan 19 23:14 grub2
drwxr-xr-x. 2 root root         200 Mar 13 01:16 block

3. Block File (b)

These files are hardware files most of them are present in /dev
find block file in Linux

ls -l /dev/* |grep ^b

[root@server1 ~]# ls -l /dev/* |grep ^b
brw-rw----. 1 root disk      8,   0 Mar 13 01:16 /dev/sda
brw-rw----. 1 root disk      8,   1 Mar 13 01:16 /dev/sda1
brw-rw----. 1 root disk      8,   2 Mar 13 01:16 /dev/sda2
brw-rw----. 1 root disk      8,  16 Mar 13 01:16 /dev/sdb
brw-rw----. 1 root cdrom    11,   0 Mar 13 01:16 /dev/sr0

4. Character device file (c)

Provides a serial stream of input or output.Your terminals are classic example for this type of files.

[root@server1 ~]# ls -l /dev/* |grep ^c
crw-rw-rw-. 1 root tty       5,   0 Mar 13 01:16 /dev/tty
crw--w----. 1 root tty       4,   0 Mar 13 01:16 /dev/tty0
crw--w----. 1 root tty       4,   1 Mar 13 01:18 /dev/tty1
crw--w----. 1 root tty       4,  10 Mar 13 01:16 /dev/tty10

5. Named Pipe file Or Just a pipe file (p)

The other name of pipe is a “named” pipe, which is sometimes called a FIFO. FIFO stands for “First In, First Out” and refers to the property that the order of bytes going in is the same coming out. The “name” of a named pipe is actually a file name within the file system.

Create pipe file using below command
# mkfifo pipe

[root@server1 ~]# ls -l |grep ^p
prw-r--r--. 1 root root    0 Mar 13 04:52 pipe

6. symbolic link file (l)

These are linked files to other files. They are either Directory/Regular File. The inode number for this file and its parent files are same. There are two types of link files available in Linux/Unix ie soft and hard link. 

#ls -l |grep ^l

7. Socket file (s)

A socket file is used to pass information between applications for communication purpose 

#ls -l |grep ^s

How did you feel about this article....?

Red Hat Enterprise Linux 7 - RHCSA and RHCE Complete Course content in detailed

I would like to share an RHCSA & RHCE examination course content in detailed.

This is an Red Hat Enterprise Linux 7 course offered by the Red Hat organization, it is not an objective exam, it is an practical exam which we have to do it practically in exam centre.

Red Hat Enterprise Linux Administrator Course which will cover RH124 and RH134 books. In New version we say EX200.

RHCSA Exam will be 3.5 Hours and total marks for the exam is 300. Out of 300, pass marks are 210.

Red Hat Certified Engineer Exam is also practical exam and the duration is 3.5 Hours. Total marks 300. Pass marks are 210.

Below is the complete RHCSA & RHCE course content in detailed.

S.No	Course	Topic Description
1	RHCSA	Introduction to course outline and certification
2	RHCSA	Linux Architecture
3	RHCSA	Linux Vs Windows
4	RHCSA	Linux Directory Structure
5	RHCSA	Installing VMWare work Station
6	RHCSA	Configuring virtual Network communication
7	RHCSA	Installing Linux Operating system using Installation media (DVD)
8	RHCSA	Installing and configuring Lab Main Server / DNS / LDAP / Kerberos, Certificate Authority and 389 Directory Server
9	RHCSA	Bash shell features
10	RHCSA	Managing files & directories
11	RHCSA	Basic Commands ls, cp, mkdir, cat, rm and rmdir
12	RHCSA	Getting help from using command line (whatis, whereis, man, help, info, --help and pinfo)
13	RHCSA	Editing Viewing of text files using nano
14	RHCSA	Linux Directory Structure
15	RHCSA	Using visual editor & visual editor modified to edit files
16	RHCSA	User Administration Creating, Modifying and Deleting
17	RHCSA	Cotrolling services & daemons
18	RHCSA	IPv4 Networking
19	RHCSA	Installing and configuring SSH Server & Client
20	RHCSA	Listing and managing processes
21	RHCSA	Prioritize process
22	RHCSA	Analyze & storing logs
23	RHCSA	Syslog Server & Client configuration
24	RHCSA	Compressing files & directories (tar and zip)
25	RHCSA	Copying files & directories to remote servers
26	RHCSA	Red Hat Package Manager
27	RHCSA	Installing and configuring Local Yellodog Updater, Modified
28	RHCSA	Installing and configuring FTP / HTTP Yellowdog Updater, Modified
29	RHCSA	Managing network interfaces using nmcli utility
30	RHCSA	Searching files and directories
31	RHCSA	File & Directory links (Soft Links and Hard Links)
32	RHCSA	Managing of physical storage - Creating Standard Partitions
33	RHCSA	Creating and Managing Logical Volume Manager
34	RHCSA	XFS quota management
35	RHCSA	Access Control List (ACL)
36	RHCSA	Scheduling of future Linux tasks using at & Crontab
37	RHCSA	SeLinux Overview
38	RHCSA	SeLinux Policy types, Listing policies and applying policies
39	RHCSA	NFS Server and Client configuration
40	RHCSA	Firewalld - configuring and managing rules
41	RHCSA	Securing the NFS using kerberos
42	RHCSA	Adding server as LDAP client
43	RHCSA	Setting up ldap users home directory
44	RHCSA	Accessing the network storage using (CIFS) samba
45	RHCSA	Samba Multiuser Access
46	RHCSA	Using Virtualized systems
47	RHCSA	Creating virtual Machines
48	RHCSA	Automated installation of Redhat Linux
49	RHCSA	Automated Installation using Kickstart
50	RHCSA	Explaining Linux booting process
51	RHCSA	Recoverying forgotten root password
52	RHCSA	Recoverying forgotten root password method-2
53	RHCSA	Fixing Partition Errors - using emergency mode
54	RHCSA	Managing daemons and serviecs
55	RHCSA	MariaDB Installation and Configuration
56	RHCSA	Using regular expressions with grep
57	RHCE	Installation & configuration of DHCP Server - reserving IP address
58	RHCE	DNS master server zones installation & configuration
59	RHCE	Installing and Configuring the Web / Httpd/ Apache Server
60	RHCE	Configuring virtual web server
61	RHCE	Making secure web server (https) ssl enabled web server
62	RHCE	WSGI script enabled web server
63	RHCE	Networking IPv6 assinging IPv6 Address
64	RHCE	Time synchronizing using NTP server and client
65	RHCE	Configure a system to forward all email to a central mail server
66	RHCE	Install and configure MariaDB
67	RHCE	Backup and restore a database
68	RHCE	Create a simple database schema
69	RHCE	Perform simple SQL queries against a database
70	RHCE	Configure a system as either an iSCSI target or initiator that persistently mounts an iSCSI target
71	RHCE	Use network teaming or bonding to configure aggregated network links between two Red Hat Enterprise Linux systems
72	RHCSA	Red Hat Certified Administrator Exam Practice Paper
73	RHCSA	Red Hat Certified Administrator Exam Practice Paper - 1
74	RHCE	Red Hat Certified Engineer Exam Practice Paper
75	RHCE	Red Hat Certified Engineer Exam Practice Paper - 1

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