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O’Reilly Books Latest LAMP Titles: mod_perl Pocket Reference SQL in a Nutshell Network Printing Books by topic: Linux Open Source Security System and Network Administration Unix Web and Internet O’Reilly Network Technologies: ONJava.com ONLamp.com openp2p.com Perl.com XML.com Apache BSD Java Javascript and CSS Linux Mac Mozilla .NET P2P Perl Policy PHP Python Web Services Wireless sensitive tag symbols are used to represent host parameters. These parameter declarations are separated by colons. The general format is: hostname:tg=value:tg=value:tg=value where hostname is the name of a bootp client and tg is a tag symbol. The currently recognized tags are listed next. Tags Tag Meaning bf Bootfile bs Bootfile size in 512-octet blocks cs Cookie server address list ds Domain name server address list gw Gateway address list ha Host hardware address hd Bootfile home directory hn Send hostname ht Host hardware type (see Assigned Numbers RFC) im Impress server address list ip Host IP address lg Log server address list lp lpr server address list ns IEN-116 name server address list rl Resource location protocol server address list sm Host subnet mask tc Table continuation to Time offset in seconds from UTC ts Time server address list vm Vendor magic cookie selector There is also a generic tag, Tn, where n is an RFC 1048 vendor field tag number. Generic data may be represented as either a stream of hexadecimal numbers or as a quoted string of ASCII characters. Return to: Alphabetical Directory of Linux Commands

Sponsored by: Search | Newsletter | Conference | Tech Jobs O’Reilly’s Emerging Technology Conference: May 13-16, 2002 Articles Linux Apache MySQL Perl PHP Python BSD Essentials What is LAMP? The Best of ONLamp.com aboutSQL Big Scary Daemons FreeBSD Basics HTTP Wrangler Linux in the Enterprise Linux Network Administration The Linux Professional Perl P5P Digest Archive PHP Admin Basics PHP Phanatics Python_News Security Alerts Alphabetical Directory of Linux Commands This directory of Linux commands is from Linux in a Nutshell, 3rd Edition. Click on any of the 379 commands below to get a description and list of available options. All links in the command summaries point to the online version of the book on Safari Tech Books Online. Buy it now Read it online bootpd [options] [configfile [dumpfile] ] TCP/IP command. Internet Boot Protocol server. bootpd normally is run by /etc/inetd by including the following line in the file /etc/inetd.conf: bootps dgram udp wait root /etc/bootpd bootpd This causes bootpd to be started only when a boot request arrives. It may also be started in standalone mode, from the command line. Upon startup, bootpd first reads its configuration file, /etc/bootptab (or the configfile listed on the command line), then begins listening for BOOTREQUEST packets. bootpd looks in /etc/services to find the port numbers it should use. Two entries are extracted: bootps the bootp server listening port and bootpc the destination port used to reply to clients. If bootpd is compiled with the -DDEBUG option, receipt of a SIGUSR1 signal causes it to dump its memory-resident database to the file /etc/bootpd.dump or the command-line specified dumpfile. Options -c directory Force bootpd to work in directory. -d level Specify the debugging level. Omitting level will increment the level by 1. -t timeout Specify a timeout value in minutes. A timeout value of 0 means wait forever. Configuration file The bootpd configuration file has a format in which two-character, case- Sponsored by:

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O’Reilly Books Latest LAMP Titles: mod_perl Pocket Reference SQL in a Nutshell Network Printing Books by topic: Linux Open Source Security System and Network Administration Unix Web and Internet O’Reilly Network Technologies: ONJava.com ONLamp.com openp2p.com Perl.com XML.com Apache BSD Java Javascript and CSS Linux Mac Mozilla .NET P2P Perl Policy PHP Python Web Services Wireless Output to file. -p prefix, –name-prefix=prefix Substitute prefix for yy in all external symbols. -t, –debug Compile runtime debugging code. -v, –verbose Verbose mode. Print diagnostics and notes about parsing tables to file.output. -V, –version Display version number. -y, –yacc, –fixed-output-files Duplicate yacc’s conventions for naming output files. Return to: Alphabetical Directory of Linux Commands

Sponsored by: Search | Newsletter | Conference | Tech Jobs O’Reilly’s Emerging Technology Conference: May 13-16, 2002 Articles Linux Apache MySQL Perl PHP Python BSD Essentials What is LAMP? The Best of ONLamp.com aboutSQL Big Scary Daemons FreeBSD Basics HTTP Wrangler Linux in the Enterprise Linux Network Administration The Linux Professional Perl P5P Digest Archive PHP Admin Basics PHP Phanatics Python_News Security Alerts Alphabetical Directory of Linux Commands This directory of Linux commands is from Linux in a Nutshell, 3rd Edition. Click on any of the 379 commands below to get a description and list of available options. All links in the command summaries point to the online version of the book on Safari Tech Books Online. Buy it now Read it online bison [options] file Given a file containing context-free grammar, convert into tables for subsequent parsing while sending output to file.c. This utility is both to a large extent compatible with yacc and named for it. All input files should use the suffix .y; output files will use the original prefix. All long options (those preceded by –) may instead be preceded by +. Options -b prefix, –file-prefix=prefix Use prefix for all output files. -d, –defines Generate file.h, producing #define statements that relate bison’s token codes to the token names declared by the user. -r, –raw Use bison token numbers, not yacc-compatible translations, in file.h. -k, –token-table Include token names and values of YYNTOKENS, YYNNTS, YYNRULES, and YYNSTATES in file.c. -l, –no-lines Exclude #line constructs from code produced in file.c. (Use after debugging is complete.) -n, –no-parser Suppress parser code in output, allowing only declarations. Assemble all translations into a switch statement body and print it to file.act. -o file, –output-file=file Sponsored by:

XML Copyright 2000-2002 O’Reilly & Associates, Inc. All Rights Reserved. All trademarks and registered trademarks appearing on the O’Reilly Network are the property of their respective owners. For problems or assistance with this site, email help@oreillynet.com

O’Reilly Books Latest LAMP Titles: mod_perl Pocket Reference SQL in a Nutshell Network Printing Books by topic: Linux Open Source Security System and Network Administration Unix Web and Internet O’Reilly Network Technologies: ONJava.com ONLamp.com openp2p.com Perl.com XML.com Apache BSD Java Javascript and CSS Linux Mac Mozilla .NET P2P Perl Policy PHP Python Web Services Wireless

Sponsored by: Search | Newsletter | Conference | Tech Jobs O’Reilly’s Emerging Technology Conference: May 13-16, 2002 Articles Linux Apache MySQL Perl PHP Python BSD Essentials What is LAMP? The Best of ONLamp.com aboutSQL Big Scary Daemons FreeBSD Basics HTTP Wrangler Linux in the Enterprise Linux Network Administration The Linux Professional Perl P5P Digest Archive PHP Admin Basics PHP Phanatics Python_News Security Alerts Alphabetical Directory of Linux Commands This directory of Linux commands is from Linux in a Nutshell, 3rd Edition. Click on any of the 379 commands below to get a description and list of available options. All links in the command summaries point to the online version of the book on Safari Tech Books Online. Buy it now Read it online biff [arguments] Notify user of mail arrival and sender’s name. biff operates asynchronously. Mail notification works only if your system is running the comsat(8) server. The command biff y enables notification, and the command biff n disables notification. With no arguments, biff reports biff’s current status. Return to: Alphabetical Directory of Linux Commands Sponsored by:

2 Return to: Alphabetical Directory of Linux Commands Copyright 2000-2002 O’Reilly & Associates, Inc. All Rights Reserved. All trademarks and registered trademarks appearing on the O’Reilly Network are the property of their respective owners. For problems or assistance with this site, email help@oreillynet.com

Input is decimal now, so A isn’t needed 8/7 1.142 Terminal displays result (truncated) The following lines show the use of functions: define p(r,n){ Function p uses two arguments auto v v is a local variable v = r^n r raised to the n power return(v)} Value returned scale=5 x=p(2.5,2) x = 2.5 ^ 2 x Print value of x 6.25 length(x) Number of digits 3 scale(x) Number of places right of decimal point