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128 The Virtualization Cookbook for Red Hat Enterprise Linux 5.2
Copy the public key to the name authorized_keys using the secure copy command scp:
# scp virtc530.itso.ibm.com:/etc/ssh/id_dsa.pub /root/.ssh/authorized_keys
This allows the controller to initiate an encrypted SSH connection to the Linux server without
the need to type the root password.
8.2.9 Rebooting the system
Now reboot to test your changes:
# reboot
Broadcast message from root (pts/0) (Sun Nov 19 08:57:32 2006):
The system is going down for reboot NOW!
8.2.10 Verifying the changes
You have now completed the customization of the master Linux image. When the system
comes back up, verify the changes that you made.
1. SSH back into the controller and check a few settings.
2. Use the df command to display your file systems (your output may differ):
# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/system_vg-root_lv
496M 237M 235M 51% /
/dev/mapper/system_vg-tmp_lv
372M 17M 337M 5% /tmp
/dev/mapper/system_vg-opt_lv
372M 17M 337M 5% /opt
/dev/mapper/system_vg-usr_lv
1.6G 949M 522M 65% /usr
/dev/mapper/system_vg-var_lv
372M 66M 288M 19% /var
/dev/dasda1 97M 12M 81M 13% /boot
tmpfs 250M 0 250M 0% /dev/shm
3. Confirm that both of your swap spaces are operational:
# swapon -s
Filename Type Size Used Priority
/dev/dasdq1 partition 259956 0 -1
/dev/dasdr1 partition 519924 0 -2
The device with higher priority will be used first; if full, the device next in priority is used. If
using defaults, the first VDISK (300, /dev/dasdq1) gets priority -1 and the second VDISK
(301, /dev/dasdr1) with priority -2 is used after the first is full. You can also specify pri=nn
in /etc/fstab for swap devices.
4. You may choose to confirm other settings.
At this point you have successfully installed the golden image. This image will normally
be shut down or quiesced.
You are now ready to clone the golden image to a new virtual server.
- 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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