Differences between RHEL6 and RHEL7

Redhat 6

1. Release Date :  10th Nov 2010 10th NOV 2010.

2. Operating System Names : If you want to see this use this command
#cat /etc/redhat-release
RHEL6 : REDHAT ENTERPRISE LINUX (SANTIGO)

3. Kernel Version :  2.6.32

4. OS Boot Time :  40 sec

5. Single Partition Size Max : 50TB(Ext4)

6. Boot Loader : /boot/grub/grub.conf

7. Processor Architecture : Supports 32bit & 64bit  both

8. How To Repair a File System : fsck -y /dev/hda6

9. Manage Network : #setup

10. KDUMP : Kdump does’t support with large RAM Size

11. Hostname Configuration File : /etc/sysconfig/network

12. Default ISO Image Mount Path : /media

13. File System Check : e2fsck

14. File System Resize : #resize2fs  -p /dev/vg00/lv1

15. Tune a File System : tune2fs

16. IP Tables and Firewall : iptables

Redhat 7

1. Release Date : 10th June 2014

2. Operating System Names :If you want to see this use this command
#cat /etc/redhat-release
RHEL7: REDHAT ENTERPRISE LINUX (MAIPO)

3. Kernel Version :   3.0.10

4. OS Boot Time :  20 sec

5. Single Partition Size Max : 500TB(xfs)

6. Boot Loader : /boot/grupb2/grub.cfg

7. Processor Architecture : Only support 64bit

8. How To Repair a File System : xfs_repair /dev/hda6

9. Manage Network : #nmtui

10. KDUMP : Supported up to 3TB

11. Hostname Configuration File : /etc/hostname

12. Default ISO Image Mount Path : /run/media/root

13. File System Check : xfs_repair

14. File System Resize : #xfs_growfs  /dev/vg00/lv1

15. Tune a File System : xfs_admin

16. IP Tables and Firewall : firewalld


NOTE:
To see firewall status in RHEL7
#firewall-cmd   –state
To see Firewall status in RHEL6
#service iptables status
To stop firewall in RHEL7
#systemctl stop firewalld.service
To stop firewall in RHEL6
#service iptables stop

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