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Chapter 6. Configuring a Network File System server for RHEL 5.2 87
6.3.1 Copying from physical DVD
RHEL 5.2 is distributed on physical CDs or files that are ISO images of CDs. RHEL 5.2 is also
distributed on a single physical DVD disc or a single ISO image. It is easier to work with a
single DVD ISO image than to work with multiple CD ISO images, so this approach is
recommended.
If you have a physical DVD, but not an ISO image, we recommend that you create an ISO
image. You could avoid creating the ISO image and copy the data directly from the DVD to
the install tree, but we recommend that you create the ISO image so that you will have a
reference file.
Be sure your PC has a DVD drive, not just a CD drive (if you have a PC that only has a CD
drive, you can create ISO images of the CDs, but this is not described). Put the DVD in the
tray and use the dd command to create the ISO image. The device file named /dev/cdrom is
often associated with the CD/DVD drive, but your device file name may be different. If so, you
must determine the correct name.
6.3.2 Verifying the ISO image
An important early step is to verify the integrity of DVD ISO image. You perform this
verification by comparing a checksum value that was calculated when the DVD was created
against a checksum value calculated against your ISO image. If the two checksum values
differ, then it means there was an error somewhere in the copying process.
The md5sum command allows you to compare checksum files. The checksum value for RHEL
5.2 for the s390x architecture is as follows:
# cat MD5SUM
8cdb5ae0d74cbfcd2e8d44a23f69ff70 rhel-5-server-s390x-dvd.iso
Run the md5sum command against the MD5SUM file:
# md5sum -c MD5SUM
rhel-5-server-s390x-dvd.iso: OK
If the ISO image does not report OK, it must be downloaded or copied again until it does.
Perform these steps only if you are starting with a physical DVD disc:
# cd /nfs
# dd if=/dev/cdrom of=rhel-5.2-server-s390x-dvd.iso
# umount /mnt/cdrom
You should now have an ISO image of the DVD.
Important: Your MD5SUM file may have checksum values for the DVD and the CD ISO
images. If this is the case and you only have one DVD ISO image, the md5sum will
generate errors of the following form:
md5sum: rhel-5-server-s390x-disc1.iso: No such file or directory
rhel-5-server-s390x-disc1.iso: FAILED open or read
This is not a problem if the DVD ISO image is reported as OK.
- The Virtualization Cookbook 1
- Linux 5.2 3
- October 2008 3
- First Edition (October 2008) 4
- Contents 5
- Contents v 7
- Contents vii 9
- Trademarks 12
- The team that wrote this book 13
- Chapters and appendixes 15
- Conventions 17
- Comments welcome 17
- 1.1 What is virtualization 20
- 1.2 This book’s approach 21
- 1.4 Infrastructure design 22
- Planning 25
- 2.1 Bill of materials 26
- 2.2 z/VM conventions 27
- 2.3 Disk planning 28
- DASD versus SCSI/FCP 29
- 3390-3s versus 3390-9s 29
- Disk storage per Linux image 29
- 2.4 Memory planning 30
- 2.5 Password planning 30
- 2.6 Planning worksheets 31
- 2.7 Blank worksheets 34
- 2.7.2 z/VM DASD worksheet 35
- Configuring a desktop machine 37
- Figure 3-2 Setting logging 39
- Saving sessions 41
- 3.2 Setting up a VNC client 42
- 3.3 3270 emulators 43
- 4.1 Installing z/VM from DVD 46
- ==> instplan 50
- Running INSTDVD 52
- Figure 4-8 Load window 53
- ==> cold drain noautolog 54
- ==> no 54
- ==> disc 54
- 4.2 Configuring TCP/IP 56
- not specified 62
- 4.6 Adding paging volumes 65
- Using the CPFORMAT EXEC 67
- 4.6.4 Testing the changes 71
- 4.8.2 Testing the changes 78
- 4.9.1 VM security products 79
- ==> sampnss cms 86
- Servicing z/VM 89
- 5.1 Applying a PTF 90
- 6.4 Enabling the NFS server 106
- 7.2.3 Configuring VDISK swap 128
- 7.2.4 Configuring yum 128
- 7.2.5 Adding additional RPMs 129
- 7.2.10 Configuring SSH keys 134
- 4 6763) is running 135
- 8.2.4 Adding additional RPMs 145
- 8.2.8 Configuring SSH keys 145
- 8.2.9 Rebooting the system 146
- 8.2.10 Verifying the changes 146
- Detach the source disks 151
- Detach the target disks 154
- IPL the target system 154
- 9.3.2 Using the clone script 157
- FLASHCOPY 159
- Installation Server 159
- Master Image 159
- 9.5 Reviewing system status 163
- LNXMAINT 164
- Delete these 167
- Servicing Linux with Red Hat 171
- 12.1.2 Testing Apache 179
- 12.1.3 Turning on a firewall 179
- 12.1.6 Apache resources 182
- Start the LDAP service 184
- Deleting duplicate users 186
- Set a password 189
- 12.3.4 Adding a Samba user 191
- 12.3.6 Testing your changes 192
- 12.3.7 Configuring printing 193
- 12.4.1 Additional resources 194
- Linux kernel development 195
- Web development 195
- Miscellaneous recipes 197
- 13.1 Adding a logical volume 198
- Volume Group - optvg 200
- Creating a physical volume 204
- Extending the volume group 204
- /var/lib/ldap 205
- Configuring LDAP 206
- Configuring automount 207
- 13.4 Rescuing a Linux system 208
- Monitoring z/VM and Linux 211
- INIDICATE LOAD 212
- INDICATE QUEUES EXP 213
- Getting help 214
- Determining who is logged on 214
- Determining storage or memory 215
- Determining software level 215
- 14.2.3 Configuring PERFSVM 218
- Using a Web browser interface 220
- Using a 3270 interface 222
- 14.3 Monitoring Linux 223
- PURGE NSS NAME MONDCSS 228
- CP SAVESEG MONDCSS 228
- References 229
- Quick reference sheets 230
- Prefix commands 231
- :help give help 232
- Appendix B. z/VM source code 233
- The CPFORMAT EXEC 234
- The CHPW540 XEDIT macro 238
- The LABEL540 EXEC 241
- The LABEL540 XEDIT macro 243
- Linux source code 245
- Related publications 257
- Online resources 258
- How to get Redbooks 258
- Help from IBM 258
- Hat Enterprise Linux 5.2 265
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