Electronics Radio

Download Advanced bash-scripting guide by Mendel Cooper PDF

By Mendel Cooper

This rfile is either an instructional and a reference on shell scripting with Bash. It assumes no prior wisdom of scripting or programming, yet progresses swiftly towards an intermediate/advanced point of guide. The workouts and heavily-commented examples invite lively reader participation. nonetheless, it's a paintings in development. The purpose is so as to add a lot supplementary fabric in destiny updates to this rfile, because it evolves right into a finished ebook that fits or surpasses any of the shell scripting manuals in print.

Show description

Read or Download Advanced bash-scripting guide PDF

Similar electronics: radio books

ADSL,VDSL and multicarrier modulation

The state-of-the-art of multicarrier modulation for the transmission of high-speed facts With DSL know-how poised to supply the quickest technique of net entry for years yet to come, there's a growing to be want for useful details on operating xDSL prone over latest cell strains. Communications professional John Bingham attracts on 3 a long time of intimate involvement with facts transmission learn to supply a whole consultant to the state-of-the-art and destiny path of multicarrier modulation (MCM)-one of the major equipment for high-speed info transmission this day.

Extra resources for Advanced bash-scripting guide

Sample text

May substitute 'more' or 'less', if desired. exit $? # Script returns exit status of pipe. " unnecessary, as the script will, in any case, # return the exit status of the last command executed. compound comparison −a logical and exp1 −a exp2 returns true if both exp1 and exp2 are true. −o logical or exp1 −o exp2 returns true if either exp1 or exp2 are true. These are similar to the Bash comparison operators && and ||, used within double brackets. [[ condition1 && condition2 ]] The −o and −a operators work with the test command or occur within single test brackets.

If [ condition1 ] then if [ condition2 ] then do−something # But only if both "condition1" and "condition2" valid. 4. Nested if/then Condition Tests 50 Advanced Bash−Scripting Guide fi See Example 35−3 for an example of nested if/then condition tests. 5. Testing Your Knowledge of Tests The systemwide xinitrc file can be used to launch the X server. This file contains quite a number of if/then tests, as the following excerpt shows. Xclients elif [ −f /etc/X11/xinit/Xclients ]; then exec /etc/X11/xinit/Xclients else # failsafe settings.

The net result is identical to using the && compound comparison operator above. if [ condition1 ] then if [ condition2 ] then do−something # But only if both "condition1" and "condition2" valid. 4. Nested if/then Condition Tests 50 Advanced Bash−Scripting Guide fi See Example 35−3 for an example of nested if/then condition tests. 5. Testing Your Knowledge of Tests The systemwide xinitrc file can be used to launch the X server. This file contains quite a number of if/then tests, as the following excerpt shows.

Download PDF sample

Rated 4.28 of 5 – based on 13 votes