By Chris Johnson
Read or Download Pro Bash Programming Scripting the GNULinux Shell PDF
Similar operating systems books
In overall, the 2 books Solaris functionality and instruments & Solaris Internals reviewed the following current a brand new point of data in regards to the internals of Solaris, what they do, how they behave, and the way to investigate that habit. The books are a needs to for builders, process programmers, and platforms directors who paintings with Solaris eight, nine, or 10.
From its uncomplicated beginnings, Linux has emerged as a robust server working procedure with a notable laptop atmosphere and consumer interface. Now, with Kylix, Linux builders have a strong swift software improvement instrument for producing client-side purposes. The Tomes of Kylix: The Linux API publications builders in the course of the primary Linux procedure functionality calls and programming interfaces, protecting the middle facets of Linux improvement from dossier processing and interprocess verbal exchange to threading matters and sockets.
The bestselling Mac consultant, up to date for the newest Mac OS X and now in complete colour! Mac OS X Lion represents a brand new period within the Mac working approach. This pleasant consultant is absolutely up to date for the most recent Mac OS X and offers every thing new Mac clients and clients upgrading to Mac OS X Lion want to know. A bestseller in past variants, Mac OS X Lion For Dummies covers the entire cool stuff and prepares you for the quirks.
- AIX 5L Basics. Instructor Guide
- Mac OS X Leopard Quicksteps
- Operating Systems
- Connected Computing Environment
Additional resources for Pro Bash Programming Scripting the GNULinux Shell
Sa; Displaying Command-Line Arguments pre=: post=: printf "$pre%s$post\n" "$@" The special parameter $@ expands to a list of all the command-line arguments, but the results differ depending on whether it is quoted. When quoted, it expands to the positional parameters "$1", "$2", "$3", "$4", and so on, and the arguments containing whitespace will be preserved. If $@ is unquoted, splitting will occur wherever there is whitespace. When a line is executed, whether at the command prompt or in a script, the shell splits the line into words wherever there is unquoted whitespace.
Sa \ this "is a" 'demonstration of' \ : this: :is a: :demonstration of: : : :quotes and escapes: quotes\ and\ escapes Quotes can be embedded in a word. Inside double quotes, a single quote is not special, but a double quote must be escaped. Inside single quotes, a double quote is not special. $ sa "a double-quoted single quote, '" "a double-quoted double quote, \"" :a double-quoted single quote, ': :a double-quoted double quote, ": $ sa 'a single-quoted double quotation mark, "' :a single-quoted double quotation mark, ": All characters inside a single-quoted word are taken literally.
There are three types of parameters: positional parameters, special parameters, and variables. Positional parameters are arguments present on the command line, and they are referenced by number. Special parameters are set by the shell to store information about aspects of its current state, such as the number of arguments and the exit code of the last command. Their names are nonalphanumeric characters (for example, *, #, and _). Variables are identified by a name. What’s in a name? I’ll explain that in the “Variables” section.
Pro Bash Programming Scripting the GNULinux Shell by Chris Johnson