Merge two ISO images of CentOS 6.8, centos6.8

Merge two ISO images of CentOS 6.8, centos6.8

Merge two ISO images of CentOS 6.8

 

1. Create related directories:

[root@local ~] mkdir -p /mnt/dvd1 /mnt/dvd2 /mnt/dvd3 /mnt/iso

Note:

/Mnt/dvd1 and/mnt/dvd2 are used to mount the two original image ISO files of Centos6.8.

/Mnt/dvd3 merged image file storage directory

/Mnt/iso creation no.: storage directory of the ISO Image

Note: The disk space of the/directory is sufficient. Because I have not enough disks, add the disk/dev/sdd and mount it to/mnt/iso.

2. Mount two original Centos image files

[Root @ local ~] Mount/dev/sr0/mnt/dev1 #/dev/sro for the original image CentOS-6.8-x86_64-bin-DVD1 [root @ local ~] Mount/dev/sr1/mnt/dev2 #/dev/sr1 for original mirror CentOS-6.8-x86_64-bin-DVD2

3. Copy an object

First, copy all the files from the first DVD (CentOS-6.8-x86_64-bin-DVD1) to the/mnt/dvd3 directory and then, copy only all RPM files in the Packages directory of the second DVD to the/mnt/dvd3/Packages directory, because the second DVD (CentOS-6.8-x86_64-bin-DVD2) cannot be used as the boot disc, so you only need to run the RPM file.

[root@local ~] cp -av /mnt/dvd1/* /mnt/dvd3[root@local ~]  cp -v /mnt/dvd2/Packages/*.rpm /mnt/dvd3/Packages/

4. Merge TRANS. TBL

Append the TRANS. TBL information in DVD2 to the end of TRANS. TBL in DVD1, and sort and save the information.

[root@local ~] cat /mnt/dvd2/Packages/TRANS.TBL >> /mnt/dvd3/Packages/TRANS.TBL[root@local ~] mv /mnt/dvd3/Packages/{TRANS.TBL,TRANS.TBL.BAK}[root@local ~] sort /mnt/dvd3/Packages/TRANS.TBL.BAK > /mnt/dvd3/Packages/TRANS.TBL[root@local ~] rm -rf /mnt/dvd3/Packages/TRANS.TBL.BAK

Dvd3 is a merged file and can be used as a local source and ISO.

5. Back up the original YUM configuration file

[root@local ~] mkdir /etc/yum.repo.d/repo.bak[root@local ~] cp /etc/yum.repo.d/*.repo /etc/yum.repo.d/repo.bak

6. generate a new YUM configuration file

[root@local ~] vim /etc/yum.repos.d/base.repo[base]name=basebaseurl=file:///mnt/dvd3gpgcheck=0

7. Update YUM Source

[root@local ~] yum clean all[root@local ~] yum upgrade

8. Pack/mnt/dvd3/as ISO

[root@local ~] mkisofs -l -J -L -r -V "CentOS-6.8-x86_64" -o /mnt/iso/CentOS-6.8-x86_64-DVD.iso /mnt/dvd3

 

Note: Due to my limited level, the created ISO file can only be used as a yum source and cannot be used as a boot disc !!