tailieunhanh - Advanced Bash-Scripting Guide 2008

The academic field and the engineering practice of computer programming are both largely concerned with discovering and implementing the most efficient algorithms for a given class of problem. For this purpose, algorithms are classified into orders using so-called Big O notation, which expresses resource use, such as execution time or memory consumption, in terms of the size of an input. Expert programmers are familiar with a variety of well-established algorithms and their respective complexities and use this knowledge to choose algorithms that are best suited to the circumstances | Advanced Bash e Scripting GuidkHgL Mendel Cooper TerminaT n X File Edit View Tenminal Ijelp 1 bin bash I 2 var-match sh I 3 Demo of pattern replacement at prefix suffix of string. 4 5 v0 abcl234zipl234abc Original variable. 6 echo vG V0 abcl234zipl234abc 7 echo 3 9 Hatch at prefix beginning of string 1G vl vữ - abc ABCDEF abcl234zlpl234abc n L 12 echo vl vl ABCDEF1234zipl234abc 13 I---Ị 14 15 Hatch at suffix end of string. 16 v2 ịịv0 - babc ABCt EF abcl234zipl23abc 17 . IS echo v2 v2 abcl234zipl234ABCDEF 19 2G 21 echo 22 23 . 2Br0-L Top Authorized Edition Advanced Bash-Scripting Guide Advanced Bash-Scripting Guide Table of Contents Advanced Bash-Scripting An in-depth exploration of the art of shell scripting .1 Mendel Part 1. Chapter 1. Shell Chapter 2. Starting Off With a . Invoking the . Preliminary Part 2. Chapter 3. Special Chapter 4. Introduction to Variables and . Variable . Variable . Bash Variables Are . Special Variable Chapter 5. . Quoting . Escaping .75 Chapter 6. Exit and Exit Chapter 7.