Linux Shell Scripting with Bash by Ken O. Burtch

Linux Shell Scripting with Bash Ken O. Burtch ebook
Publisher: Sams
ISBN: 0672326426, 9780672326424
Page: 434
Format: pdf

The first difference can be seen in the above example; when comparing strings, the double-bracket syntax features shell globbing. Anthony James — November 25, 2012. Shell script that emulates the tree command in Linux - posted in Bash / Shell Scripting: #!/bin/bash # This shell program prints a tree diagram of # the files in a directory, using recursion. One using the in keyword with list of values, another using the C programming like syntax. Unix Shell Script : While Loop. The default shell for the majority of Linux distributions is "bash". A shell script is a plain-text file that contains shell commands. Last Modified On: June 8, 2013 By Abinash Sharma. May look like a comment, but it is a special symbol that informs Linux which shell to run on the script — in this case, bash, located in the bin directory. That should always be the first line of every shell script you write – it tells Linux that it's a shell script. There are two types of bash for loops available. And that's what if does essentially, . Conditions in bash scripting (if statements). The general syntax as follows for “bash while loop” : while [ CONTROL-COMMAND ]; do CONSEQUENT-COMMANDS; done. It can be executed by typing its name into a shell, or by placing its name in another shell script. If you use bash for scripting If you always wondered why bash tends to use -ge or -eq instead of >= or ==, it's because this condition type originates from a command, where -ge and -eq are options.