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Unix System Administration Handbook
Corrections to Printing 2
In the following updates, changed words are italicized. Sometimes, changes are just described rather than written literally.
Page xxxiv
Paul Kooros, a significant contributor, was inadvertently omitted from the Acknowledgments section.
Page 20
Erich Boleyn's GRand Unified Bootloader (GRUB), now maintained as part of the GNU project, is gaining popularity as an alternative to LILO and the Windows boot loaders. It offers a variety of advanced features. See www.gnu.org/software/grub for more information.
The book claims that Windows NT and Windows 2000 require their boot loaders to be installed in the MBR. This isn't always true; on the other hand, it isn't exactly false, either. On some systems, LILO will boot NT without any problem. Other systems don't seem to accept this configuration without crashing. We don't know what distinguishes one type of system from the other, although the exact partitioning of the disk may have some influence.
Page 28
In the third paragraph under the heading Solaris startup scripts, the directory name should be /etc/default, not /etc/defaults.
Page 92
FreeBSD's useradd command actually runs the pw command to make changes to the passwd and group databases. If you write your own scripts, you may find it helpful to use pw as well.
Page 131
There is some confusion in this chapter between the Veritas Volume Manager and the Veritas File System, both of which are available for HP-UX. However, only the Veritas File System is bundled with HP-UX. The default logical volume manager that is included with HP-UX (and that is described in this chapter) is a proprietary volume manager called LVM.
Page 132
To increase performance, implementations of disk mirroring use both sides of the mirror for reads during normal operation.
Page 139
There is some confusion in this chapter between the Veritas Volume Manager and the Veritas File System, both of which are available for HP-UX. However, only the Veritas File System is bundled with HP-UX. The default logical volume manager that is included with HP-UX (and that is described in this chapter) is a proprietary volume manager called LVM.
Page 143
There is some confusion in this chapter between the Veritas Volume Manager and the Veritas File System, both of which are available for HP-UX. However, only the Veritas File System is bundled with HP-UX. The default logical volume manager that is included with HP-UX (and that is described in this chapter) is a proprietary volume manager called LVM.
Page 145
In the second paragraph, the default value for the kernel parameter maxvgs should be 10, not 20 as stated. Thus, the default range of values for NN is 00 to 09.
Page 172
Tape drive manufacturer OnStream has gone out of business. Its assets have been acquired by a Dutch group that plans to continue selling ADR drives under the OnStream brand name. Nevertheless, the future prospects for this product are extremely uncertain.
Page 185
The GNU version of tar handles files with holes correctly if you use the -S option when creating an archive. It is not necessary to use -S when restoring.
Page 205
Some GNU utilities (in particular, zgrep) can make it a lot more convenient to keep log files in a compressed format. It is also faster on some machines to read compressed data from the disk and decompress it on the fly; compressing old log files can be a double win.
Page 233
After copying the new kernel to /boot, you must also copy /usr/src/linux/arch/i386/boot/System.map to /boot/System.map.
Page 250
In the middle of the page, devices/net/Space.c should be drivers/net/Space.c
Page 255
The Linux loadable kernel module configuration file is /etc/modules.conf, not /etc/conf.modules.
Page 256
The Linux loadable kernel module configuration file is /etc/modules.conf, not /etc/conf.modules.
Page 257
The year of publication of Linux Kernel Internals is 1998, not 1997.
Page 267
The full name of the IEEE 802.2 LLC is the "Logical Link Control Layer", not the "Link Layer Control" as stated in the footnote.
Page 270
The URL given for the IANA assigned Ethernet numbers table is obsolete. Use www.iana.org/assignments/ethernet-numbers.
Page 276
The CIDR address breakdown on this page is messed up. Please substitute the following text:
"For example, suppose a site has been given a block of 8 class C addresses numbered 192.144.0.0 through 192.144.7.0 (in CIDR notation, 192.144.0.0/21). Internally, the site could use them as
- 1 network of length /21, 2,046 hosts, netmask 255.255.248.0
- 8 networks of length /24, 254 hosts each, netmask 255.255.255.0
- 16 networks of length /25, 126 hosts each, netmask 255.255.255.128
- 32 networks of length /26, 62 hosts each, netmask 255.255.255.192"
Page 277
The URL referred to in the footnote, www.telstra.net/ops/bgptable.html, no longer exists. Check www.telstra.net/ops/bgp/index.html for current information.
Page 279
The correct URL for the CAIDA IPv4 address space utilization map is http://www.caida.org/outreach/resources/learn/ipv4space
Page 307
In footnote a of Table 13.15, /etc/inet/inodes should be /etc/inet/ipnodes.
Page 311
On the last line of the fourth paragraph of the section Dynamic reconfiguration and tuning for Solaris, the set option to ndd was improperly separated from the hyphen preceding it. This option should be entered as -set.
Page 317
The output of netstat -nr should show the gateway for the destination 127.0.0.1 as 127.0.0.1, not 127.0.0.
Page 326
In Table 13.21, ip_echo_ignore_broadcasts should be icmp_echo_ignore_broadcasts.
At the end of the first text paragraph, "The defaults subdirectory contains the default values as shipped," defaults should actually be default.
Page 331
The second excerpt on the page is missing a closing double quote on the last line. The last line should read:
route_212="-net 132.236.212.64 -netmask 255.255.255.192 132.236.212.6"
Page 371
The year of publication of the second edition of Christian Huiema's Routing in the Internet is 2000, not 1999.
The second edition of Bassam Halabi's book Internet Routing Architectures has been released. The publication year is 2000.
Page 375
Another major advantage of unshielded twisted-pair Ethernet is that the link to each machine is private. Machines in the same vicinity cannot overhear each other's network traffic.
Page 384
DSL connections are private to individual customers, while cable modem users normally share bandwidth with their neighbors. Cable modems can therefore be subject to congestion during busy periods. They are also considerably less secure.
Page 388
Regarding the expandability of fiber installations, we received this interesting report from a person at the University of Utah: "The University of Utah was the first large installation of air-blown fiber technology in North America. The technology was developed by British researchers and then commercialized by Sumitomo of Japan. Instead of buried fiber cables, we have buried hoses about 5cm in diameter; four of these enter the math.utah.edu machine room. Each hose contains 6 or 8 transparent tubes, each of which holds 6 or more cladded fiber cables, each of which can contain 6 to 18 fibers (depending on whether single-mode or multi-mode fibers are used). A new fiber cable can be blown in or out of the transparent tube at a speed up about 1m/s, over a distance of up to 5000m. The result is massive expandability without ever digging another trench, and we are supremely glad that we chose this excellent technology."
Page 391
The title of the book cited as The Complete Guide to Network Wiring is actually Cabling: The Complete Guide to Network Wiring.
Page 466
The dnssec-makekeyset command no longer uses the keyword now. Use the notation +XXX to specify a time XXX seconds in the future.
Page 518
When used with an rsync server, rsync requires a module name as the first component of the destination, not a path name. The example rsync command should read:
rsync -gopt --password-file=/etc/rsync.pwd
/etc/passwd lollipop::sysfiles
Page 519
The example rsyncd.conf file is missing some relevant options. The complete example should be:
[sysfiles] path = /etc secrets file = /etc/rsyncd.secrets read only = false uid = root gid = root hosts allow = distribution_master_hostname
The file shown as rsynd.conf is really called rsyncd.conf
Page 610
The feature referred to as lmtp is actually named local_lmtp:
FEATURE(`local_lmtp’, `path-to-mail.local’)
Page 616
The verbose delivery example uses /usr/ucb/mail, not /usr/bin/mailx as claimed (although the output would be identical).
Page 633
The collision rate on interface hme1 is 0.13%, not 1.3%.
Page 666
In the last paragraph, /usr/adm/inetd.sec should be /var/adm/inetd.sec.
Page 672
It's worth mentioning that the protocol used by SSH was designed to withstand a wide variety of hacking methods, such as session hijacking and man-in-the-middle attacks.
Page 697
FreeBSD consults only ~ftp/etc/pwd.db, not ~ftp/etc/passwd. You must run the pwd_mkdb command after editing ~ftp/etc/passwd to generate the hashed version. See the man page for details.
Page 706
Contrary to the statement at the top of page 706, it is becoming increasingly common for dedicated Unix boxes to provide parallel ports.
Page 708
The lprm command does not always work perfectly across a network, especially if different platforms are involved in the printing transaction.
Page 709
Instances of the printer name "anchor-lw" should actually be "anchor-lj".
Page 713
Instances of the printer name "anchor-lw" should actually be "anchor-lj".
Page 726
Instances of the printer name "anchor-lw" should actually be "anchor-lj".
Page 729
Instances of the printer name "anchor-lw" should actually be "anchor-lj".
Page 731
An example at the top of the page shows the -p option to the lp command being used to select a destination for the print job. This should actually be the -d option.
Page 738
In the Filters section, the lpr option to disable filters is called -Y, not /direct. There is a printcap option called "direct" that has the same effect.
Page 746
We shouldn't have used the word "isolate" in the sentence "A ground strap worn on the wrist and attached to a special mat that you kneel on (most computers require you to show proper respect!) will isolate you properly." The purpose of a grounding strap is of course to ground you, which is the opposite of being electrically isolated.
Page 765
It's probably fair to say that quotas and process accounting have a slight impact on performance these days, rather than a "noticeable" impact.
Page 830
A final word on the origin of the name comsat, from Kirk McKusick: "...comsat and biff were written by Bill Joy one day when Heidi Stettner came in told him that her dog barked when the postman came, so why couldn't she get the same thing for email? comsat stands for 'communications satellite' (e.g., beaming down email?) and uses the same name as the ITS program with a similar function."
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