New PDF release: Advanced Bash−Scripting Guide

By Mendel Cooper

ISBN-10: 1146068727

ISBN-13: 9781146068727

Данное руководство не предполагает наличие у читателя познаний в области программирования на языке сценариев, однако, быстро восполняет этот недостаток . . . постепенно, шаг за шагом раскрывая мудрость и красоту Unix(tm). Это руководство может рассматриваться как учебник, предназначенный для самостоятельного изучения или как справочник по программированию на shell. Руководство снабжено серией хорошо прокомментированных примеров, поскольку лучший путь к изучению языка сценариев -- это написание сценариев.

Кроме того, эта книга может служить в качестве учебного пособия по основам програмирования вообще.

Show description

Read Online or Download Advanced Bash−Scripting Guide PDF

Similar programming books

Xcode 4 iOS Development Beginner's Guide by Steven F. Daniel PDF

This step by step e-book publications you thru the method of constructing striking iOS apps utilizing Xcode four. As a beginner's consultant, it specializes in getting you thru the entire significant studying issues in a gentle, logical order whereas exhibiting you ways to prevent a few universal pitfalls. for you to easy methods to construct iOS purposes that compete with the remainder and make your mark in the iOS undefined, this ebook is for you.

Get Beginning Programming All-In-One Desk Reference For Dummies PDF

So that you are looking to be a programmer? or perhaps you simply are looking to have the capacity to make your machine do what you will want for a transformation? might be you benefit from the problem of determining an issue and fixing it. If programming intrigues you for no matter what cause, starting Programming All-In-One table Reference For Dummies is like having a starter programming library multi function convenient, if beefy, publication.

Univ.-Doz. Dipl.-Ing. Dr. Christoph Überhuber, Mag. Peter's Software-Entwicklung in Fortran 90 PDF

Fortran, die seit vierzig Jahren führende Programmiersprache der Numerischen Datenverarbeitung (des medical Computing), hat vor kurzem eine radikale Modernisierung erfahren: Fortran ninety, das die bisherige model FORTRAN seventy seven vollständig umfaßt und darüber hinaus neue, mächtige Sprachkonstrukte enthält, die eine Grundlage für die Entwicklung qualitativ hochstehender numerischer software program bilden.

Additional resources for Advanced Bash−Scripting Guide

Example text

Illegal division by 0. # 1 # What effect does the "2>/dev/null" have? # What would happen if it were removed? # Try removing it, then rerunning the script. 2. File test operators Returns true if... −e file exists −a file exists This is identical in effect to −e. It has been "deprecated," and its use is discouraged. ) −c Chapter 7. ) −p file is a pipe −h file is a symbolic link −L file is a symbolic link −S file is a socket −t file (descriptor) is associated with a terminal device This test option may be used to check whether the stdin ([ −t 0 ]) or stdout ([ −t 1 ]) in a given script is a terminal.

The effect is to nest an inner if/then construct within an outer one. if [ condition1 ] then command1 command2 command3 elif [ condition2 ] # Same as else if then command4 command5 else default−command fi Chapter 7. Tests 46 Advanced Bash−Scripting Guide The if test condition−true construct is the exact equivalent of if [ condition−true ]. As it happens, the left bracket, [ , is a token which invokes the test command. The closing right bracket, ] , in an if/test should not therefore be strictly necessary, however newer versions of Bash require it.

Introduction to Variables and Parameters 30 Advanced Bash−Scripting Guide $0 is the name of the script itself, $1 is the first argument, $2 the second, $3 the third, and so forth. [16] After $9, the arguments must be enclosed in brackets, for example, ${10}, ${11}, ${12}. The special variables $* and $@ denote all the positional parameters. Example 4−5. " # Strips out path name info (see 'basename') echo if [ −n "$1" ] then echo "Parameter #1 is $1" fi # Tested variable is quoted. # Need quotes to escape # if [ −n "$2" ] then echo "Parameter #2 is $2" fi if [ −n "$3" ] then echo "Parameter #3 is $3" fi # ...

Download PDF sample

Advanced Bash−Scripting Guide by Mendel Cooper

by Donald

Rated 4.42 of 5 – based on 36 votes