How to edit war file rar or any other zip file

How to edit war file rar or any other zip file

Open 7-Zip , 

Remove the entries from the text box , View and Editor make them blank (BLANK , Otherwise it will not work)

This will open the file in default notepad , edit the file and save it.

Click on OK here. This is far easier then extracting the file and modify the file and zip it again.

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March 26, 2018 at 08:59AM
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How to install Windows 10 & OEL 7 dual boot

How to install Windows 10 & OEL 7 dual boot

For me these steps were not working in UEFI mode. So I disabled UEFI mode on my Desktop.

1. Performed Windows install normally.
2. Ensured that I have some space in one partition
3. After this installed OEL 7 normally 
4. Unlike OEL6 , OEL 7 does not have the mechanisam to detect windoes partion and create a grub entry

For this you have to install ntfs packages first

Step-1 (Enable EPEL Repository)

wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

rpm -ivh epel-release-latest-7.noarch.rpm

Step-2 (Install NTFS-3G packages for enabling support for NTFS file system)

yum install ntfs-3g -y

Step-3 (Enable NTFS support for file managers)

yum install ntfsprogs -y

After installing the above packages 

sudo grub2-mkconfig > /dev/null

... you should see the windows boot listed. If the other entry / entries are OK, go ahead and write it.

If Windows was listed in the previous step, go ahead and save the new configuration file. Make a backup first, just in case.

sudo cp /boot/grub2/grub.cfg /boot/grub2/grub.cfg.old

sudo grub2-mkconfig -o /boot/grub2/grub.cfg

Reboot the machine and you should see new Menu to reboot to windows

references : https://www.techbrown.com/mount-ntfs-file-system-centos-7-rhel-7.shtml

https://unix.stackexchange.com/questions/169787/windows-boot-option-is-missing-after-installing-centos-7-how-can-i-get-it-back

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March 19, 2018 at 02:03PM
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Increasing the SYstem.img file

Increasing the SYstem.img file

Attach the System.im file to Dom-0

xm block-attach 0 file:///OVS/xxxx/System.img xvda w

Resize the file

qemu-img resize xxxxx/System.img +40G

fidsk /dev/xvda

Disk /dev/xvda: 55.8 GB, 55834574848 bytes

64 heads, 32 sectors/track, 53248 cylinders

Units = cylinders of 2048 * 512 = 1048576 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x0005f11b

    Device Boot      Start         End      Blocks   Id  System

/dev/xvda1   *           2         503      514048   83  Linux

/dev/xvda2             504       51200    51913728   83  Linux

/dev/xvda3           51201       53248     2097152   83  Linux

Detach the Block storage

xm block-detach 0 xvda

Delete the partion 3 and 2 using the fdisk commands and then create a partition 2 with the start and end size as  504       51200

Similarly create a swap partition with he size  51201       53248 

Restart the Oracle VM after this 

Run the command 

df -h

Filesystem                        Size  Used Avail Use% Mounted on

/dev/xvda2                        9.4G  3.1G  5.9G  34% /

tmpfs                             3.0G  199M  2.8G   7% /dev/shm

/dev/xvda1                        479M   49M  405M  11% /boot

/dev/xvdb                          50G  6.6G   41G  15% /fmw11g

You will see the size as still 9.4G instead of 50GB , 

Resize the file to occupy the space

 resize2fs -f /dev/xvda2

resize2fs 1.43-WIP (20-Jun-2013)

Filesystem at /dev/xvda2 is mounted on /; on-line resizing required

old_desc_blocks = 1, new_desc_blocks = 4

The filesystem on /dev/xvda2 is now 12978432 blocks long.

 fdisk -l

Disk /dev/xvda: 55.8 GB, 55834574848 bytes

64 heads, 32 sectors/track, 53248 cylinders

Units = cylinders of 2048 * 512 = 1048576 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x0005f11b

    Device Boot      Start         End      Blocks   Id  System

/dev/xvda1   *           2         503      514048   83  Linux

/dev/xvda2             504       51200    51913728   83  Linux

/dev/xvda3           51201       53248     2097152   83  Linux

Enable the swap space

mkswap /dev/xvda3

swapon  /dev/xvda3

To make this swap space partition available even after the reboot, add the following line to the /etc/fstab file.

# cat /etc/fstab

/dev/sdc1 swap swap defaults 0 0

(Reference : https://www.thegeekstuff.com/2010/08/how-to-add-swap-space/?utm_source=feedburner)

After this reboot the guest machine.

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March 13, 2018 at 04:13PM
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