Download Advanced Bash−Scripting Guide. An in−depth exploration of by Cooper M. PDF

By Cooper M.

This educational assumes no earlier wisdom of scripting or programming, yet progresses swiftly towards an intermediate/advanced point of guide ...all the whereas sneaking in little snippets of UNIX knowledge and lore. It serves as a textbook, a guide for self-study, and a reference and resource of information on shell scripting recommendations. The workouts and heavily-commented examples invite lively reader participation, less than the idea that the one technique to fairly study scripting is to put in writing scripts.

Show description

Read or Download Advanced Bash−Scripting Guide. An in−depth exploration of the gentle art of shell scripting PDF

Best electronics: radio books

Using Z.Specification,refinement,and proof

This ebook comprises sufficient mnaterial for 3 entire classes of research. It offers an advent to the area of good judgment, units and kinfolk. It explains using the Znotation within the specification of real looking structures. It indicates how Z necessities can be subtle to supply executable code; this can be established in a range of case reviews.

Characterization Of Semiconductor Materials

Characterization of semiconductor fabrics and techniques used to signify them might be defined commonly during this new Noyes sequence. Written via specialists in each one topic zone, the sequence will current the main updated info on hand during this quickly advancing box. contains chapters on electric Characterization, Ion Mass Spectrometry, Photoelectron Spectroscopy, Ion/Solid Interactions and extra.

Handbook of Rf, Microwave, and Millimeter-wave Components.

"This exact and accomplished source will give you a close therapy of the operations ideas, key parameters, and particular features of energetic and passive RF, microwave, and millimeter-wave elements. The e-book covers either linear and nonlinear parts which are utilized in a variety of software components, from communications and knowledge sciences, to avionics, area, and army engineering.

Extra resources for Advanced Bash−Scripting Guide. An in−depth exploration of the gentle art of shell scripting

Sample text

02, introduced the "**" exponentiation operator. let "z=5**3" echo "z = $z" # z = 125 % modulo, or mod (returns the remainder of an integer division operation) bash$ echo `expr 5 % 3` 2 This operator finds use in, among other things, generating numbers within a specific range (see Example 9−23 and Example 9−25) and formatting program output (see Example 26−8 and Example Chapter 8. Operations and Related Topics 55 Advanced Bash−Scripting Guide A−7). It can even be used to generate prime numbers, (see Example A−17).

What actually happens here is that the "\" escapes the newline and #+ the effect is variable=echo "$variable" #+ invalid variable assignment variable=\ 23skidoo echo "$variable" # 23skidoo # This works, since the second line #+ is a valid variable assignment. sh: \: command not found # # First escape escapes second one, but the third one is left "naked", #+ with same result as first instance, above. variable=\\\\ echo "$variable" # \\ # Second and fourth escapes escaped. k. Escaping a space can prevent word splitting in a command's argument list.

What would happen if it were removed? # Try removing it, then rerunning the script. 2. File test operators Returns true if... ) −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. −r file has read permission (for the user running the test) −w file has write permission (for the user running the test) −x file has execute permission (for the user running the test) −g set−group−id (sgid) flag set on file or directory Chapter 7.

Download PDF sample

Rated 4.38 of 5 – based on 48 votes