Download PDF by Carl Albing: Bash Cookbook: Solutions and Examples for Bash Users

By Carl Albing

ISBN-10: 0596526784

ISBN-13: 9780596526788

The e-book is outstanding and fulfills all my expectancies of what a cookbook can be. you could forget about the 1-star evaluate simply because that reviewer simply made the error of pondering Cookbooks are for beginners - they're not.

If you recognize a bit bash, then this e-book will bootstrap you the entire approach as much as specialist in case you make the effort to check it. whether you do not care to be a bash specialist you continue to wish this publication -- it's going to prevent a ton of time on each bash script you write.

I've owned the ebook for only every week and already used 6 various recipes inside 2 scripts i wanted to write down. I used to get anxious each time i wished to drop into bash - essentially simply because i do not use it usually sufficient to ever grasp. so long as this booklet is via my part i'll worry not more!

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Additional resources for Bash Cookbook: Solutions and Examples for Bash Users (Cookbooks (O'Reilly))

Example text

Does not behave as you might expect or desire. , or [ is treated as a pattern, and replaced by an alphabetically sorted list of file names matching the pattern. * matches any string, including the null string, while ? matches any single character. Characters enclosed in [ ] specify a list or range of characters, any of which will match. There are also various extended pattern-matching operators that we’re not going to cover here (see 10 | Chapter 1: Beginning bash “Pattern-Matching Characters” and “extglob Extended Pattern-Matching Operators” in Appendix A).

The braces are actually reserved words, so they must be surrounded by white space. Also, the trailing semicolon is required before the closing space. Alternately, you could use parentheses ( ) to tell bash to run the commands in a subshell, then redirect the output of the entire subshell’s execution. out Discussion While these two solutions look very similar, there are two important differences. The first difference is syntactic, the second is semantic. Syntactically, the braces need to have whitespace around them and the last command inside the list must terminate with a semicolon.

4 Getting Information About Files Problem You need more information about a file, such as what it is, who owns it, if it’s executable, how many hard links it has, or when it was last accessed or changed. Solution Use the ls, stat, file, or find commands. /bin/bash -' > /tmp/sample_file $ file /tmp/sample_file /tmp/sample_file: Bourne-Again shell script text executable $ file -b /tmp/sample_file Bourne-Again shell script text executable For much more on the find command, see all of Chapter 9. 8 | Chapter 1: Beginning bash jp) Discussion The command ls shows only filenames, while ls -l provides more details about each file.

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Bash Cookbook: Solutions and Examples for Bash Users (Cookbooks (O'Reilly)) by Carl Albing


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