See all sample for loop shell script in our bash shell directory.See the following resources for more info. However, for complicated IT automation tasks, you should use tools like Ansible, Salt, Chef, pssh and others.

For loops can save time and help you with automation for tiny tasks. You learned how to use the bash for loop with various example. Video 01: 15 Bash For Loop Examples for Linux / Unix / OS X Shell Scripting Conclusion The video shows some additional and practical examples such as converting all flac music files to mp3 format, all avi files to mp4 video format, unzipping multiple zip files or tar balls, gathering uptime information from multiple Linux/Unix servers, detecting remote web-server using domain names and much more. This tutorial is also available in a quick video format. This will produce average stats as follows, indicating that multiple load balancer ICMP ECHO_REQUEST average time was 19-20 milliseconds Finding ping time for multiple IP addressesįor i in $ips do ping -q -c 4 '$i' done

It would be best if you set up ssh keys for automation purposes or running scripts from Linux/Unix cron jobs. See why we used DEBIAN_FRONTEND apt-get variable to avoid any prompts during updates. Latest bash version 3.0+ has inbuilt support for setting up ranges: #!/bin/bashīash v4.0+ has inbuilt support for setting up a step value using ' Sometimes you may need to set a step value (allowing one to count by two’s or to count backwards for instance). A representative example in BASH is as follows to display welcome message 5 times with for loop: #!/bin/bash

The for loop executes a sequence of commands for each member in a list of items.

The range is specified by a beginning (#1) and ending number (#5). This type of for loop is characterized by counting. OR for OUTPUT in $(Linux-Or-Unix-Command-Here) Numeric ranges for syntax is as follows: for VARIABLE in 1 2 3 4 5.

Conky for mac