Red Hat LINUX VIRTUAL SERVER 4.6 - ADMINISTRATION Manuale di Installazione Pagina 153
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Chapter 7. Installing RHEL 6 on the cloner 133
7.2.8 Configuring SSH keys
SSH sessions are typically authenticated with passwords entered on the keyboard. With SSH
key-based authentication, sessions can be authenticated with public and private keys so that
no password is needed. SSH key-based authentication can be set up from the cloner (client)
to the virtual servers. If the master image has a copy of cloner’s public key in the
/etc/ssh/authorized_keys file, then key-based authentication will work on the cloned virtual
servers. Create a new DSA key in the /root/.ssh/ directory. If the /root/.ssh/ directory
does not yet exist, create it by running the mkdir command:
# cd /root/.ssh
# ssh-keygen -t dsa -P "" -f id_dsa
Generating public/private dsa key pair.
Your identification has been saved in id_dsa.
Your public key has been saved in id_dsa.pub.
The key fingerprint is:
96:19:83:28:27:84:45:01:fa:e0:c8:8e:62:b8:01:30 roo[email protected]m.com
The key's randomart image is:
+--[ DSA 1024]----+
|.==. |
|o. . . |
|E o o . o |
|=+ + = |
|oo. S |
|= . |
|=o |
|oo |
|. |
+-----------------+
This command creates a key pair where the file with the .pub suffix is the public key and the
other file is the private key. Note that the private key is only readable by root:
# ls -l id_dsa*
-rw-------. 1 root root 668 Oct 19 16:49 id_dsa
-rw-r--r--. 1 root root 619 Oct 19 16:49 id_dsa.pub
These files will be copied to the golden image Chapter 8, “Installing and configuring the
golden image” on page 137.
7.2.9 Inserting the vmcp module
To issue CP commands, the vmcp module is needed. By default, it is not loaded at boot time.
If you would like it to run at boot time, add the modprobe vmcp command, which will insert the
module, to the /etc/rc.d/rc.local, file, which is run at boot time:
# cd /etc/rc.d
# vi rc.local // add one line
...
touch /var/lock/subsys/local
modprobe vmcp
The vmcp command will now be available after the next reboot.
- Enterprise Linux 6.0 1
- February 2011 3
- First Edition (February 2011) 4
- Contents 5
- Contents v 7
- Contents vii 9
- Trademarks 12
- Chapters and appendixes 13
- Conventions 14
- The team who wrote this book 15
- Special thanks 15
- Comments welcome 16
- Preface xv 17
- Summary of changes 19
- 1.1 What is virtualization 23
- 1.4 Infrastructure design 24
- Planning 27
- 2.1 Bill of materials 28
- 2.2 z/VM conventions 29
- Real address 30
- LPAR identifier 30
- 2.3 Disk planning 31
- 2.4 Memory planning 32
- 2.5 Password planning 32
- 2.6 Planning worksheets 33
- 2.7 Blank worksheets 36
- 2.7.2 z/VM DASD worksheet 37
- Configuring a desktop machine 39
- Figure 3-2 Setting logging 41
- Saving sessions 43
- 3.2 Setting up a VNC client 44
- 3.3 3270 emulators 45
- Figure 4-3 Recovery menu 51
- Running INSTDVD 57
- Figure 4-11 Load window 58
- 4.2 Configuring TCP/IP 61
- 4.6 Adding paging volumes 70
- Using the CPFORMAT EXEC 72
- 4.6.4 Testing the changes 76
- 4.8.2 Testing the changes 83
- 4.9.1 VM security products 84
- clipping the volumes 90
- Servicing z/VM 93
- Chapter 5. Servicing z/VM 75 95
- Chapter 5. Servicing z/VM 77 97
- Chapter 5. Servicing z/VM 79 99
- S9338801 in this example): 100
- Chapter 5. Servicing z/VM 81 101
- Chapter 5. Servicing z/VM 85 105
- Chapter 5. Servicing z/VM 87 107
- 5.4 Applying a PTF 108
- Chapter 5. Servicing z/VM 89 109
- Chapter 5. Servicing z/VM 91 111
- Chapter 5. Servicing z/VM 93 113
- Chapter 5. Servicing z/VM 95 115
- Configuring an NFS/FTP server 117
- 6.4 Enabling the NFS server 120
- 7.1 Installing the cloner 126
- Figure 7-2 NFS setup panel 135
- 7.2 Configuring the cloner 147
- 7.2.8 Configuring SSH keys 153
- 7.2.12 Rebooting the system 155
- 7.2.13 Verifying the changes 155
- Figure 8-4 166
- 8.2.7 Configuring SSH keys 172
- 8.2.10 Rebooting the system 173
- 8.2.11 Verifying the changes 173
- Detaching the source disks 180
- 9.4.3 Using the clone script 185
- 9.6 Reviewing system status 193
- 11.1.2 Testing Apache 202
- 11.1.3 Turning on a firewall 203
- 11.1.6 Apache resources 205
- 11.2.3 Adding an LDAP user 207
- 11.3.4 Adding a Samba user 212
- 11.3.6 Testing your changes 213
- 11.3.7 Configuring printing 215
- 11.4.1 Additional resources 217
- Servicing Linux with Red Hat 219
- Miscellaneous tasks 223
- 13.1 Adding DASD 224
- 13.2 Adding a logical volume 226
- Volume Group - homevg 227
- 13.4 Adding SCSI/FCP disks 233
- 4014402600000000. Change the 235
- 13.5 Rescuing a Linux system 239
- 13.9 The X Window System 251
- Using PuTTY 254
- Using embedded SSH 256
- INIDICATE LOAD 260
- INDICATE QUEUES EXP 261
- Getting help 262
- Determining who is logged on 262
- Determining storage or memory 263
- Determining processors 263
- 14.2.3 Configuring PERFSVM 266
- Using a web browser interface 270
- Using a 3270 interface 272
- 14.3 Monitoring Linux 274
- References 277
- Cheat sheets 278
- A vi cheat sheet 279
- Additional material 281
- Related publications 283
- Online resources 284
- Help from IBM 285
- Hat Enterprise Linux 6.0 293
- Back cover 296
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