perl for unix and linux shell programmers

... notes. 4 Unix and Linux Backups – SANS GIAC LevelOne © 2000, 2001 4 Unix/ Linux Backup Commands •tar •dump •dd •cpio (in Appendix) The archival commands we will discuss here are tar, dump, and dd. As ... 1 Unix and Linux Backups – SANS GIAC LevelOne © 2000, 2001 1 Unix and Linux Backups for System Administrators By Robert Blader Hello, my name ... each is suited for different types of backups. Combined, they form a versatile toolkit for performing backups. Some information on syntax - the dash proceeding option flags for tar and dump are

Ngày tải lên: 17/01/2014, 08:20

... In both Windows and Linux the serial port is treated as a file, and the file read and write operations are used to send 5 data to and from the port. These operations differ from standard file input/output ... specific appli- cation. 3.1.2 Linux Opening the serial port in Linux is performed in much the same way as it is in Windows, using the open() command. One caveat to Linux is that the user ID that ... is now opened and, in this case, fd is a handle to the opened device file. As can be seen, if the open() function call fails, the device handle is set to −1 and by checking the handle against

Ngày tải lên: 05/11/2013, 20:15

... shell and other operating systems 12 Unix Shells     The Bourne Shell The Bourne shell is the original UNIX shell program It is very widely used You can start the Bourne shell ... Commands In Unix  $ man  The command.. .Unix Shells    The Bourne shell /bin/sh (written by S R Bourne) Along came the people from UCB and the C -shell /bin/csh was born Into this shell ... in the form of if/then/else statements In addition, the Bourne shell supports case statements and loops (for, while, and until) The Bourne shell uses the $ as a prompt 13 Unix Shells

Ngày tải lên: 24/10/2014, 10:51

... Study UNIX and LINUX 10.1 History of unix 10.2 Overview of unix 10.3 Processes in unix 10.4 Memory management in unix 10.5 Input/output in unix 10.6 The unix file system 10.7 Security in unix ... 2 UNIX The layers of a UNIX system. Us er Inter face 3 UNIX Utility Programs A few of the more common UNIX utility programs required by POSIX 4 UNIX Kernel Approximate structure of generic UNIX ... alarm 8 POSIX Shell A highly simplified shell 9 Threads in POSIX The principal POSIX thread calls. 10 The ls Command Steps in executing the command ls type to the shell [...]... calls for managing

Ngày tải lên: 24/10/2014, 10:54

... Study 1: UNIX and LINUX 10.1 History of unix 10.2 Overview of unix 10.3 Processes in unix 10.4 Memory management in unix 10.5 Input/output in unix 10.6 The unix file system 10.7 Security in unix ... Steps in executing the command ls type to the shell SinhVienZone.com https://fb.com/sinhvienzonevn 10 The UNIX File System (2) • Before linking • After linking (a) Before linking (b) After linking ... https://fb.com/sinhvienzonevn UNIX Kernel Approximate structure of generic UNIX kernel SinhVienZone.com https://fb.com/sinhvienzonevn Processes in UNIX Process creation in UNIX SinhVienZone.com https://fb.com/sinhvienzonevn

Ngày tải lên: 28/01/2020, 22:27

... Case Study 1:? ?UNIX? ?and? ?LINUX 10.1 History of? ?unix? ? 10.2 Overview of? ?unix? ? 10.3 Processes in? ?unix? ? 10.4 Memory management in? ?unix? ? 10.5 Input/output in? ?unix? ? 10.6 The? ?unix? ?file system  10.7 Security in? ?unix? ? ... POSIX? ?Shell A highly simplified? ?shell Threads in POSIX The principal POSIX thread calls The ls Command Steps in executing the command ls type to the? ?shell The? ?UNIX? ?File System (2) • Before linking ... 10.7 Security in? ?unix? ? UNIX User Interface The layers of a? ?UNIX? ?system UNIX? ?Utility Programs A few of the more common? ?UNIX? ?utility programs required by POSIX UNIX? ?Kernel Approximate structure of generic? ?UNIX? ?kernel

Ngày tải lên: 30/01/2020, 04:43

... UNIX AND LINUX SYSTEM ® ® ADMINISTRATION HANDBOOK FOURTH EDITION This page intentionally left blank UNIX AND LINUX SYSTEM ® ® ADMINISTRATION HANDBOOK FOURTH EDITION Evi ... informit.com/ph Library of Congress Cataloging-in-Publication Data UNIX and Linux system administration handbook / Evi Nemeth [et al.] —4th ed p cm Rev ed of: Unix system administration handbook, ... Example Linux distributions 11 Example UNIX distributions 12 v vi UNIX and Linux System Administration Handbook System-specific

Ngày tải lên: 20/10/2022, 10:44

... Programs 4-14 FORMAT Precompiler Option 4-14 Pro*FORTRAN Precompiler (AIX, HP, Solaris, and Tru64 Only) 4-15 Pro*FORTRAN Demonstration Programs 4-15 Pro*FORTRAN User Programs 4-16 SQL*Module for Ada ... UNIX Systems provide instructions for administering and configuring Oracle9i release 2 (9.2.0.1.0) on UNIX systems Audience This document is intended for anyone responsible for ... parameters, and user settings for Oracle9i to work This chapter describes the various settings for Oracle9i on AIX, HP, Linux, Solaris, and Tru64 In Oracle9i files and programs,

Ngày tải lên: 07/04/2014, 15:57

... Programs 4-14 FORMAT Precompiler Option 4-14 Pro*FORTRAN Precompiler (AIX, HP, Solaris, and Tru64 Only) 4-15 Pro*FORTRAN Demonstration Programs 4-15 Pro*FORTRAN User Programs 4-16 SQL*Module for Ada ... UNIX Systems provide instructions for administering and configuring Oracle9i release 2 (9.2.0.1.0) on UNIX systems Audience This document is intended for anyone responsible for ... parameters, and user settings for Oracle9i to work This chapter describes the various settings for Oracle9i on AIX, HP, Linux, Solaris, and Tru64 In Oracle9i files and programs,

Ngày tải lên: 07/04/2014, 16:30

... Programs 4-14 FORMAT Precompiler Option 4-14 Pro*FORTRAN Precompiler (AIX, HP, Solaris, and Tru64 Only) 4-15 Pro*FORTRAN Demonstration Programs 4-15 Pro*FORTRAN User Programs 4-16 SQL*Module for Ada ... UNIX Systems provide instructions for administering and configuring Oracle9i release 2 (9.2.0.1.0) on UNIX systems Audience This document is intended for anyone responsible for ... parameters, and user settings for Oracle9i to work This chapter describes the various settings for Oracle9i on AIX, HP, Linux, Solaris, and Tru64 In Oracle9i files and programs,

Ngày tải lên: 07/04/2014, 16:51

... command 53 Perl as a (better) sed command 89 Perl as a (better) awk command 121 Perl as a (better) find command 178 Part Minimal Perl: for UNIX and Linux Shell Programmers 203 Built-in functions ... gratitude for all the good times we’ve had together brief contents Part Minimal Perl: for UNIX and Linux Users 1 Introducing Minimal Perl Perl essentials 16 Perl as a (better) grep command 53 Perl ... Minimal Perl: for UNIX and Linux Users 1 Introducing Minimal Perl 1.1 A visit to Perlistan 3 Sometimes you need a professional guide 1.2 Perl can be simple 1.3 About Minimal Perl What Minimal Perl...

Ngày tải lên: 25/03/2014, 10:27

... command 53 Perl as a (better) sed command 89 Perl as a (better) awk command 121 Perl as a (better) find command 178 Part Minimal Perl: for UNIX and Linux Shell Programmers 203 Built-in functions ... gratitude for all the good times we’ve had together brief contents Part Minimal Perl: for UNIX and Linux Users 1 Introducing Minimal Perl Perl essentials 16 Perl as a (better) grep command 53 Perl ... Minimal Perl Minimal Perl For UNIX and Linux People BY TIM MAHER MANNING Greenwich (74° w long.) For online information and ordering of this and other Manning books, please...

Ngày tải lên: 06/08/2014, 03:20

... routinely in Minimal Perl and removed only in the rare cases where it spoils the results It’s shown here for both the sed and perl commands for uniformity PERL S INVOCATION OPTIONS 19 $ perl -wpl -e ... ' # Output Generation This next group is for commands that read input: alias alias alias alias perl_ io=' perl_ iop=' perl_ f=' perl_ fp=' perl perl perl perl -wnl -wpl -wnla -wpla ' ' ' ' # # # ... process input a paragraph at a time: alias alias alias alias alias Perl_ o=' Perl_ io=' Perl_ iop=' Perl_ f=' Perl_ fp=' perl perl perl perl perl -00 -00 -00 -00 -00 -wl -wnl -wpl -wnla -wpla ' ' ' ' '...

Ngày tải lên: 06/08/2014, 03:20

... Explanation /perl/ Looks for a match with perl in $_ Matches perl in $_ m :perl: Same, except uses different delimiters Matches perl in $_ $data =~ /perl/ i Looks for a match Matches perl PERL Perl ... Unix and Perl commands for common grepping activities Unix command Perl counterpart Type of task Section grep 'RE' F perl -wnl -e '/RE/ and print;' F Show matching lines 3.3.1 grep -v 'RE' F perl ... after consulting man ascii: 104 LHS and RHS, respectively, stand for left- and right-hand-side, and DQ stands for double quotes CHAPTER PERL AS A (BETTER) sed COMMAND ...

Ngày tải lên: 06/08/2014, 03:20

... COMMAND Note, however, that the use of $$ isn’t appropriate for commands: $ perl -wpl -i.$$ -e 's /UNIX/ Linux/ g;' os In cases like this, $$ is a Shell variable that accesses the PID of the Shell ... of AWK and Perl next NOTE 5.2 AWK is totally AWKsome, but Perl is even better; it’s Perlicious! COMPARING BASIC FEATURES OF awk AND PERL This section provides an overview of how AWK and Perl compare ... $total, as in $total += $_ CHAPTER PERL AS A (BETTER) awk COMMAND Table 5.8 AWK and Perl programs for simple tasks AWK a Perl b Explanation

Ngày tải lên: 06/08/2014, 03:20

... '-A and ! -B and print;' # Example perl -wnl -e '-A and -B and -C and print;' # Example perl -wnl -e '( -A or -B ) and print;' # Example perl -wnl -e '( -A or -B or -C ) and print;' # Example perl ... 201 P A R T Minimal Perl: for UNIX and Linux Shell Programmers P art focused on ways in which simple Perl programs can provide superior alternatives to standard Unix commands Along the way, you ... use a special kind of find | perl pipeline for filtering out undesirable arguments for Unix utilities, and how to use Unix utilities for validating arguments for Perl programs 6.4 PROCESSING...

Ngày tải lên: 06/08/2014, 03:20

... nearest relative in Unix or the Shell Table 7.8 Useful Perl functions for lists, and their nearest relatives in Unix Built-in Perl function Unix relative(s) sort The Unix sort command List sorting ... Table 7.7 The rand function Typical invocation formats $random_tiny_number=rand; $random_larger_number=rand N; $random_element=$some_array[ rand @some_array ]; Example Explanation $num=rand; Assigns ... similarities and differences in how data flows between commands and functions 7.3.1 Comparing Unix pipelines and Perl functions Although there are distinct similarities between Unix command pipelines and...

Ngày tải lên: 06/08/2014, 03:20

... back-quote syntax for command substitution, of the form $(command) INTERPOLATING COMMAND OUTPUT INTO SOURCE CODE 269 Table 8.6 Command substitution/interpolation in the Shell and Perl Shell a Perl Explanation ... backslashes, quotes, commas, and semicolons Table 8.9 shows the syntax for eval in both the Shell and Perl Table 8.9 The eval function in the Shell and Perl Shell Perl eval 'command' error=$? (( $error ... submit a command to the OS-dependent command interpreter (/bin/sh on Unix) for execution 18 See http://TeachMePerl.com/DQs_in _shell_ vs _perl. html for further details EXECUTING OS COMMANDS USING...

Ngày tải lên: 06/08/2014, 03:20

... variable The syntax for the Shell s for loop is shown in table 10.5 alongside that of its Perl counterpart, foreach Table 10.5 The Shell s for loop and Perl s foreach loop Shell a Perl for var in LIST ... quality value The Shell s for loop is similar to Perl s foreach loop, not Perl s for loop LOOPING WITH for Although the Shell s for is like Perl s foreach, Perl does have a for loop of its own, ... $index=rand @fortunes; # select random index CHAPTER LIST VARIABLES 27 28 29 30 31 32 printf $fortunes[ $index ]; # print random fortune delete $fortunes[ $index ]; # mark fortune undefined @fortunes=grep...

Ngày tải lên: 06/08/2014, 03:20

... (such as “perlcheat”, “perltoot”, and “perlguts”) TIP 10.8 You can use the only Shell loop that Larry left out of Perl by getting the Shell: :POSIX::Select module from the CPAN SUMMARY Perl provides ... executing its shell function, using what’s known as the CPAN -shell command: perl -M'CPAN' -e 'shell; ' If you get the following response, CPAN is already configured for your system, and you’re ready ... contrast Perl subroutines with Shell user-defined functions, because functions are different in many ways, and many Shell programmers aren’t familiar with them anyway CHAPTER 1 SUBROUTINES AND VARIABLE...

Ngày tải lên: 06/08/2014, 03:20