INSTALLATION STEPS OF REDHAT RHEL7 .

So Guys your wait is  over now .I have worked on RHEL7.0 and its very interesting OS out of all  RHEL I have worked on.In this Post I am not discussing any new features or differences,here I am giving you full steps of installation of RHEL7.0 .Use these steps and post  your queries here.
First of all I would like to give you Hardware Requirement for RHEL7.0

Hardware Requirement for RHEL7.0:-

1. Red Hat support Installation on Storage Connected Using Standard interface Such as SATA,SCSI,SAS.
2. Red Hat also support Installation on Bios/Firmware RAID devices.
3. Red Hat does not support Installation on USB or SD Cards.
4. Red Hat also support Block devices of following Virtualization Technologies:-

• Xen Block Devices on Intel Processors in Xen Virtual Machines.
• VirtIO Block Devices on Intel Processors in KVM Virtual Machines.

So I will start With CPU .

• As RHEL7.0 is 64bit OS we need to have 64bit CPU with Virtualization Technology (VT) enabled Support in Intel Processors and Secure Virtual Machine (SVM) Support for AMD Processors.
•  RHEL-7 does not support 32 bits CPU machine for installation.

For RAM

• RHEL7 can support Theoretically 64TB of RAM but Practically it support only 3TB of Maximum RAM.
• RHEL 7 Minimum RAM requirement is 1GB.Recommended is 1GB per Logical CPU for X86_64 Systems.
• For IBM POWER Minimum RAM requirement is 2GB and Recommended is 2GB per RHEL7.

For Storage Space

• RHEL-7 Support Some New Filesystems.
• RHEL-7 Support XFS,btrfs,ext4 for boot, and other System and data Mount Points.

Now Steps of Installation With Snapshots:-

1. Boot From RHEL7 DVD  and you will get a similar Boot Menu like we have in Fedora 15 or above.

2. Now Select Language for Installation Process.

More Coming Soon .....

How to configure Samba Server in RHEL 6 Linux Os.

So in this documentation we are going to share a folder named /data over network using samba server .The best thing about samba server is we can access samba shares in any Windows OS like Windows XP,Vista,Windows 7 etc.

• Samba Server also supports User based Authentication and Host Based Restrictions .
• Samba Server is also restricted by Selinux enforcing mode.So guys keep in mind to change the Selinux Context of File or Directories.

Steps to configure Samba Server :-

• yum -y install samba* (command to install samba server packages )

• Now create /data directory if not already created in your system.

            mkdir /data

• Now as Selinux is in enforcing mode so please change the context of /data directory.Guys its not recommended to disable or make selinux permissive .So work in enforcing mode and change the context as follows.

           chcon -R -t  samba_share_t   /data

•  Now edit /etc/samba/smb.conf

       In this file we need to move to global settings section and we need to define workgroup of our network as below.
              workgroup = MYGROUP  (MYGROUP is the name of workgroup we want to define )

Now we need to define interfaces of server machine which are allow to receive client queries. For example on server pc if we have two interfaces named eth0 and eth1 but we want to have samba share request only on eth0 so we can do that using interfaces option in smb.conf file as below.
          
                         interfaces = lo eth0

Now we need to define share folder we need to share across network.

{myshare}    >>> this is the share name of folder.
comment = my share folder   >>> any description
path = /data
writable = yes  >> writable option is use to give write permission if writable is yes than user will have read and write permission otherwise user will have read permissions only.
valid users = user1 >>> user1 is allow to access this share folder accross network.

browseable = yes >>> this option will make this folder visible when user list all share folders.

Now save and quit this file.

Now as we have define user1 for samba share so we need to create this user and also need to define samba password for this user.

useradd user1
smbpasswd -a user1 >> command to define samba password.

-a option is use to to add user in the samba user's catalog.


Now finally start samba daemons to apply changes :

service smb restart
chkconfig smb on

How to define File Access Control List (FACL or ACL) in Linux RHEL6

In linux we know to define permissions we have chmod command but this command defines permission to user mode group mode or others only .But if we need to define different permissions to different users individually we need to think about setfacl and getfacl commands .

The setfacl command is use to define file or folder permissions for individual user or group other than user owner group owner or other (i.e ugo).

setfacl -m u:username:permission <file absolute or relative path>

-m -- option to modify permission
u -- for user
g -- for group

The getfacl command is use to check ACL implemented on a file or folder.

How to Configure RedHat Directory Server in RHEL6

Coming Soon.....